Pathfinder
CR 1.

Includes things like:
horse [AC 11, hp 15, Melee 2 hooves –2 (1d4+1) ]
Orog [AC 18, hp 23, Melee greataxe +5 (1d12+4) ]
Gnoll [AC 15, hp 11, Melee spear +3 (1d8+3/x3) ]

pretty massive difference there in difficulty.  Assuming a one-on-one fight with a PC with AC 13 or so damage, always hits for 6 damage with a +5 to-hit...

Vs horse:  if horse goes first, pc kills it in 6 rounds and horse deals about 15 damage
vs orog: pc kills it in 9 rounds, orog deals about 49 damage
vs gnoll: pc kills it in 4 rounds, gnoll deals about 19 damage.  With a 20% chance that it'll crit for about the same damage that the orog does in 4 rounds)

note to self: do not use pathfinder as a benchmark on monster balance.

In reply to Mittens (msg # 1):

http://www.d20pfsrd.com/classe...ter/iconic-fighter-1