ePSXe is closed source and there is no way to copy their solution unless its devs agree to share it. Also, PCSX-ReARMed, while being sub-optimal in a few areas, is better than ePSXe in many other ways and comparing their overall "betterness" on basis of one or two games is meaningless, not to mention kind of insulting.
Lastly, PCSX-ReARMed is composed of code from many different forks of PCSX, so unless the games were broken by the NEON GPU plugin or the porting process, this type of question should be directed to authors of the original code.