Question about vers UE4

  1. What version of UE4 should I use?
  2. is there a difference from all UE4 versions ?

If your just starting you should go with the latest version as it has the most features and should be stable. If your already deep in a project you should probably stick with your current version (because updating can break your project) unless you need a new feature.

Here you can see all the features from every engine release.

my spech laptop amd A12 RADEON R7, RAM 8 GB, HDD 1TB, will support latest version???

Yes you should be good.

whenever i build to android my UE4 not reponding