ok first it's a great shot. I'd prefer this one as I always feel colour allows the background to get a little messy in street shots as you can't control it. B/W kind of balances it all out.
Ohhhh, love this one too! Normally I prefer shots from behind but I think I'm gonna say I like this one the best. His expression is fantastic and I love that there's a sign in the background saying "ahead". Definitely a favourite!