#1
Which one is better, and why?

jem555 or an RG2550E?

I'm going to be given one of them, I just have to pick. I don't know which is better.
#2
The RG2550E.

Check the reviews on UG, the RG2550E got a much higher rating.
Gear: Lindo victory flying V, Orange 30w practice amp, Jazz iii guitar picks, mobile phone apps for tuner and metronome.