Verified answer

Old Man Yama is stronger...........Ichigo cant even defeat me without the help of his Hollowfication...............

More than likely ichigo because of the fact that ichigo using his hollow form or even final getsuga tenshou while using his bankai, he would probably be fast enough to get into yama's weak points (when his bankai gets hot), attack with a getsuga or mugetsu and get out without receiving too much damage

At 1st I though Ichigo b/c Yamamoto couldn't defeat Aizen and Ichigo did (while looking GORGEOUS in the Final Getsuga Tensho stage, long black hair suits him).

BUT after seeing Yamamoto's bankai, I'm like "Hm... maybe those 2 should fight to the death and see."

I mean, if Yamamoto doesn't stop using his bankai, he'll destroy all of Soul Society.

But think about it, this arc just barely started (compared to the all Aizen arc) and if Yamamoto kills that king guy, then what's the point of having Ichigo in Hueco Mundo?

But really now, who can say?

NO!!!! Ichigo is not stronger than Yamamoto, if yamamoto used his bankai he would be able to beat Aizen, he just had to protect everyone so he couldnt fight Aizen afterwards. also if ichigo does try to use GT on Yama, then the West of his bankai will incinerate it.

at least now, I think Yama is stronger.