You should get one first, and compare.
Without having one, i loved the 1/48 more in fighter mode, but saw the big difference in the v.2 1/60 battroid poseability.
Always intended to buy atleast one, and now i like the fighter mode just as good as the 1/48 now..
Main thing is you want the 1/60 v.2 for poseability in battroid/gerwalk, but won't need to sell off all your 1/48 if your a static poser lacking imagination to warrant the swap.