SkechersMen's Expected Avillo Relaxed-Fit Slip-On Loafer

What is the difference between the Melvin and the Avillo? both are in relaxed fit category. thanks.

I usually wear an 8 1/2 or 9 shoe. Amazon recommended an 8 1/2 but they felt a little tight but not to bad. Should I order a size 9?

I am usually and 11 2e, but i always get an 11.5 2e in running shoes. So what size shoe i get in these?

How well does the elastic, mid shoe, hold up? Seems like that might be a weak spot. Thanks!