And when I say size, I mean width

I've been shaving with a 7/8ths razor, and recently I bought a new razor (a 5/8ths) and for some reason I cant get as good of a shave with it. I know there could be dozens of variables as to why, but I'm wondering if blade width is one of them? Has anyone here had the same experience? I'm sure both are sharp and shave ready, nothing has changed in my shave prep, stropping etc.

Thanks for your help!

James