I've got 3 S1K's - and one Benjamin Legacy 1000. The B-L has the same action as the Genesis, so my input might be useful.
No 2 ways about it, the S1K action is superior in just about every respect. The BL action is heavier, harsher, recoils more, and seems to generate a little less power than the Gamo. The factory sight on the S1K is very usable, the one on the BL is a joke. The trigger on the BL is pretty bad, although it IS a true 2-stage and can be improved quite a bit with a lighter trigger spring.
In all honesty, I did get a lemon BL - but even after getting it straightened out with a new compression tube, piston, seal, barrel, mainspring, and beefing up the breach lockup spring, it's still inferior to the Gamo overall.
The only thing nice about it is Crosman's parts support, which is very good. But in my experience even the Quest is a better rifle.