Today I went into the gym and decided to go from flat bench to incline just to mix it up. Now from what I've herd and seen people have a harder time lifting the same amount of weight on a incline than they do a flat... Well I went in there and totally blew my flat bench off the roof... I did 140 x 10 on incline and can barley push 6 on flat... Plus I had some amazing ass form.. Is that weird or are just different muscles in my body stronger? And will someone please explain the benefits of Incline Vs Flatt Vs Decline...and if maybe I should just stick to doing incline instead of flat?

Thank You