Well... Actually, not. Friend of mine shown me all possible boots (Old Macs, Boas, Cavallos, Epics and Bares) so I'd make my choice what I want to buy and Epics and Bares took much less time than Old Macs and Boas.
As for Epic versus Bare it's harder to put Bares on for the first 5-10 times, and then it's faster actually (because you don't have to deal with clip). Problems with Epics is that first, wire gets broke at some point, so you have to change it, and second, clip may get loose (and that happened first time I used easyboots my friend borrowed me to try). However for Epics you have more freedom to make them more loose or more tight: bares have just 3 positions. That's exactly why I got Epics for my 2nd horse.
It's really a matter of taste and I prefer bares: just slide them on and here we go.
I know some people complain about how hard to put them on, and if you follow easyboot company recommendations it's indeed VERY hard: took me about 40 mins. However friend of mine (using easyboot for ages) laughed to death when he saw how I do it. The trick is you pull the leg forward (like you want to rasp off the walls) and then just slide the boot on (like you put own boots), and then pull gator up, so it would be flat and wrap it around the leg. Takes several mins in beginning, but takes me 30 secs after I got used to it.