I voted Bituli. I love Jennings as much as the next guy and he's our offensive MVP no question. His heart, his leadership and desire is unmatched there. We have some talented WRs behind him however, and I've never been one to believe that individuals that play outside the numbers win and lose you football games consistently over a long stretch of data.
However, I have no idea what our defense looks like without Bituli. He's the anchor in the middle and allows the younger FR and SO to play more with their eyes as he has them lined up in the right spots. With that, they're able to be put into positions to succeed by the coaching staff. Without Bituli, it's fair to say the impressive play by that group as a whole is significantly worse just from the mental aspect, before we even talk about the on field play.
His consistency has kept us in games this year longer then we should have been on that side (mainly UGA and Alabama come to mind - personally noticed a significant drop off once he was ejected for the ridiculous targeting) and you could argue we may not win last saturday night in Lexington without him in the run first attack.
Interesting debate though.