Is the UE3 or UE4 lighter for a low-spec game?

Development Platform & Builds Mobile
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A quick note of my experience with mobile:

  1. Overall compatibility with more devices and super cheap low end [Mobile]. Unity is way to go. However, semi-new mid range and up is fairly good on side. (Fun fact i’ve gotten my galaxy s1 to run ue4, although it only maintain about 15fps with paper 2d and very simple assets)

  2. Personally UE4 can run pretty well on mid-range devices. DO NOT expect good performance from 50-100$ tablets. I have a couple ~100$ “china devices” [That i picked out to have best gpu for the price] I still get constant 30 FPS on my game (without much optimization). Not shabby, maybe this next year/generation of $100 devices will have a bump in newer gpu’s that will keep UE4 in ~45-60 fps (ex: dual boot intel cherry trail gpu’s should do this).

  3. Epic has stated as far as mobile is concerned they are targeting mid-range and up (That is about galaxy s3 and up really).