I feel that i have a slight edge on my competition when they are just a little bit bigger than me. (10-20 LBS) im not talking about anything drastic like a light weight and a heavyweight. What are the UGs Thoughts on this?
Are you talking about after a weight cut? 
anytime. really not trying to get to detailed into cutting weight i just feel i got a good speed andvantage standing up and more room to move on the ground against someone that is bigger than me
Agreed. For me fighting big slow dudes is a cakewalk. I'm always still way stronger than them and they can't handle the speed of my riddum.
Yeah i really feel like i have a big advantage when im grappling with someone bigger than me especially if they are taller. there is just much more room for me to move.
if it were boxing or kickboxing, maybe.
in my experience once you start to include grappling in general and the standing clinch in particular, weight takes on a whole different level of importance.
even if i am stronger than the bigger guy, he just plain weighs more. all of the advantage i might have from being moderatly quicker goes out the window once he gets me against the cage.
my 2 cents.