i agree you should try both, but i already have several times so i will give you me opinion
MR 6.5.3 is more stable than Energy 6.5.3 (but 6.5.3 isn't very stable to begin with)
MR and Enegry 6.5 are about the same in stability but i find Energy much faster and it's already skinned for you.
if you are planning to in reskin everything and apply a ton of gui changes ect. MR will be far less likely to give you any problems or stability issues