Ultracote also does something that I think Monokote doesn't do. The glue activates fully at a lower temperature than the plastic starts to strink. So with Ultracote, you can get the film glued down and work with the stuff, move it around, pull it tight by hand, then turn up the iron just a little bit to start the strinking and get it really tight. This is all in the instructions that come wrapped around the covering roll. Btw, Ultrakote is now available in more colors than it used to be, it looks like they are really going to try to take on Monokote for selection, A real bonus.

Ultracote also strinks at a lower temp than Monokote, I use it directly over foam, which you can't do with Monokote (but you can do it with Towerkote/Econokote).

Oh, on the silly side, I've done covering-over-covering by using something low temp like Ultracote over top of a high temp covering like Monokote. It actually works well, but not well enough to intentionally buy rolls of different brand covering. I did it because that was what was lieing around, and it worked well.