Nidhogg (FLIES!!)
Hit points: 1800
hack damage:30 splash (x.1 vs. hero)
crush: 40 splash
Range: 4 m
Armor:40 %
Pierce Armor: 50%
Speed: 3.7 m/s (faster with Thurisaz rune)
Units bad against: Heros, Toxotes, Peltasts, Slingers, CA's, Thraxmen, Towers
Units good against: Non-tower buildings, non-ranged units except heros
Son of Osiris (Hero):
Hit points: 420 (546 max)
Hack damage: 60 (x4 vs myth), chain lightning of 4
Range: 18 m
Armor: 30%
Pierce Armor: 50%
Speed: 3.6 m/s (i dont think this is right, bug in the unit guide?)
Units bad against: Nothing, except swarms of human units
Units good against: Myth units
I know there was a poll before on this, but that was when/before the game was out. Now, what do you like more? Personally i like the SoO more simply because of the bonus vs myth.