41 IP: 2 W, 4 S, 37 K, 0.88 ERA, 0.78 WHIP
41.1 IP: 3 W, 0 S, 51 K, 1.74 ERA, 0.73 WHIP
I have both on my team and so I like them equally.
BUT Okajima's peripherals are downright filthy, so I can see why he gets the nod. Neshek will K more batters but Okajima is in line for more save opportunities - all in all, it doesn't really matter because they're the two best mid-relievers in baseball right now so if you have one, smile.