It's base dmg is 116, oat is 126, but this has higher H2H skill bonuses.
iirc isn't every 5-6 h2h skill roughly a point of base dmg added?
So it's closer to 118-119 dmg. To say nothing of the larger attack bonuses. (10 less delay, as if that's much though.)
Nice enhancments to counter if your tanking^^
Personally, I'd take a Spharai over an oat. (This one has better asethtic looks too)