I actually haven't played the 2nd one, but I wound up spoiling myself on the last 2 and a half cases, so I know more or less the plot. I plan on getting if if I get a Vita, and it looks like that'll likely happen this Winter season (probably on a black friday sale).
I played Danganronpa 1 with the fantranslation actually (and fortunately I played this one almost blind). I'll likely pick up the original version on Vita or at least gift it to someone though, because I really did enjoy my time with it. I WAS kinda spiteful that it got more love while Zero Escape almost died, but I'm feeling less salty now that ZE3 is a reality. While I may not enjoy it more than ZE and Phoenix Wright, it's a very fun and unique game and I'm glad I got a chance to play it.
From what I've seen I prefer Danganronpa 1, but the 2nd one had some great twists imo and some fun characters. The big thing about the 1st one is that I actually felt really bad with the trials in the 1st one (coming close to tears with at least one). I didn't get similar feelings with what I saw of the 2nd one, although watching in a stream instead of playing it alone probably had some influence.