So, here's some wacky ass shit. Wizards put up a 4e version of a module they put up on the website last fall. Its an interesting look at how much 4e diverges from 3rd. It should be noted that its, 1- written by Ari Marmell, the genius who brought the epic fail that is the shadowcaster to the game, and 2- a blatant Lovecraft rip.
Both versions are in this archive:
http://www.wizards.com/default.asp?x=dnd/duarch/ad
And wow, does this shit diverge wildly. The levels are roughly the same, but the stat blocks make me laugh out loud. Partly because the 4e ones aren't significantly shorter than the 3rd edition ones, and partly because these fuckers made a completely different game.
Example:
3rd edition
Althanis, Cult of Dagon Leader CR 8
LoM 61
hp 42 (7 HD); DR 5/magic
Male pseudonatural human cleric 7
CE Medium outsider (augmented humanoid)
Init +1; Senses darkvision 60 ft.; Listen +3, Spot +3
Languages Common
AC 19, touch 11, flat-footed 18
(+1 Dex, +7 armor, +1 shield, 2 deflection against good only [protection from good]))
Miss Chance 20% (ranged only) entropic shield
Immune mind-affecting (good only, protection from good)
Resist acid 5, electricity 5, fire 10 (resist energy); SR 16
Fort +6, Ref +3, Will +8; +2 against good (protection from good)
Speed 20 ft. in breastplate (4 squares), base speed 30 ft.
Melee mwk morningstar +5 (1d8–1)
Ranged mwk light crossbow +7 (1d8/19–20)
Base Atk +5; Grp +4
Atk Options rebuke water creatures/turn fire creatures 5/day (+2, 2d6+9, 7th), rebuke undead 5/day (+2, 2d6+9, 7th)
Special Actions alternate form, spontaneous inflict spells, true strike
Cleric Spells Prepared (CL 7th, 8th for evil spells):
4th—poison (+7 melee touch, DC 16), unholy blightD(DC 17)
3rd—bestow curse (DC 16), cure serious wounds, magic circle against goodD, wind wall
2nd—fog cloudD, hold person (DC 15), resist energy†, silence (DC 15), spiritual weapon (+7 melee touch)
1st—bless, command (DC 14), doom (DC 14), entropic shield†, protection from goodD†, sanctuary (DC 14)
0—detect magic, guidance, light, resistance (2), virtue
D: Domain spell. Deity: Dagon. Domains: Evil, Water.
†Already cast
Abilities Str 8, Dex 12, Con 13, Int 10, Wis 16, Cha 14
SA rebuke water creatures, rebuke undead, turn fire creatures, true strike
SQ aura of chaos, aura of evil
Feats Alertness, Improved Initiative, Sudden Still (Complete
Arcane; as Still Spell, but can be applied spontaneously
without increasing spell slot, 1/day), Swift Horror (unique feat; allows Althanis to adopt his alternate form as a move action)
Skills Bluff +5, Concentration +11, Knowledge (religion) +4, Knowledge (the planes) +5, Listen +3, Spellcraft +5, Spot +3
Possessions masterwork morningstar, masterwork light crossbow, masterwork light steel shield, +1 breastplate, pearl of power (1st), 20 bolts, holy symbol of Dagon
Alternate Form (Su) As a move action, Althanis can take the form of a grotesque mass of rubbery, squidlike flesh with numerous writhing tendrils. Despite the alien appearance, his abilities remain unchanged. Other creatures receive a –1 morale penalty on their attack rolls against Althanis when he is in this alternate
form.
True Strike (Su) Once per day, Althanis can gain a +20 insight bonus on a single attack roll. In addition, he suffers no miss chance against a target that has concealment or total concealment when making this attack.
4e guy:
Althanis, High Priest of Dagon’s Cult (A) Level 9 Elite Controller (Leader)
Medium elemental humanoid XP 800
Initiative +6 Senses Perception +8; low-light vision
Dagon’s Blessing aura 2; allies that begin their turns in this
area gain a +2 bonus to damage rolls until the start of their
next turn
HP 194 Bloodied 97
AC 25; Fortitude 20, Reflex 23, Will 24
Resist 5 acid, 5 cold, 5 poison
Saving Throws +2
Speed 6
Action Points 1
m Mace (standard; at will) ✦ Weapon
+14 vs. AC; 1d8 + 4 damage.
r Dagon’s Fang (standard; at will) ✦ Psychic
Ranged 10; +13 vs. Fortitude; 2d6 + 6 psychic damage.
r Dagon’s Flame (standard; at will) ✦ Radiant
Ranged 10; +13 vs. Fortitude; the target is pushed 1 and
blinded until the end of Althanis’s next turn.
R Dagon’s Maw (standard; at will)
Make two Dagon’s fang attacks, two Dagon’s flame attacks,
or one of each.
C Winding Serpents (standard; recharge 4+) • Necrotic
Close blast 5; +13 vs. Reflex; 2d8 + 6 necrotic damage, and
phantom serpents wind about the target, restraining the
target until the end of its next turn.
R Command (standard; encounter) ✦ Charm
Ranged 10; +13 vs. Will; the target is dazed until the end of
Althanis’s next turn, and the target slides 4 or is knocked
prone.
C Ring of Terror (immediate reaction, when an enemy moves
adjacent; encounter) ✦ Fear
Close burst 1, triggering target only; +13 vs. Will; the target
is pushed 4.
Horrific Repulsion (immediate reaction, when first bloodied;
encounter) ✦ Fear
Althanis recharges and immediately uses his ring of terror.
Horrid Form (immediate reaction, when first injured in combat;
encounter) ✦ Polymorph
Althanis takes on the form of a grotesque mass of rubbery,
squidlike flesh with numerous writhing tendrils. All
enemies take a –1 penalty to melee and ranged attacks
against Althanis in this form until he is bloodied. Despite
the alien appearance, his other abilities remain unchanged.
Alignment Chaotic evil Languages Abyssal, Common
Skills Religion +9
Str 10 (+4) Dex 14 (+6) Wis 18 (+8 )
Con 17 (+7) Int 10 (+4) Cha 22 (+10)
Its also worth noting how the bog standard fish-guys change. The level 1 rogues with 16 hit points become 77 hp meat shield lurkers. And there are more of them. Its a nice reminder of how fucked up the 3rd edition CR system is, and how fucked up the 4e system is in a completely different way.