I ordered new Tech 8's and Tech 10's in the same size 10 to see if there were differences. Historically, I am a Tech8 fan, old school with the old inner booty. The new tech 8's have a different inner booty, however, the fit is great. The boot is slimmer than the old, but the feel of the Tech 8 is amazing. I have a wide foot, so I came down a size from my old ones from an 11 to a 10. The fit is incredible! Onto the tech 10. The size 10 tech 10's did NOT fit. I could not even get one foot into the boot. I ordered a size 11, same issue. The ankle booty on the Tech 10's is uncomfortable and seems fairly restrictive. So, I'm sticking with the NEW Tech 8. Motorsport shipped everything and handled the exchanges brilliantly.