diffrenence between roms of 16gb vs 32gb G# topic

hi
i am looking for lg g3 855. but got to know that 16gb g3 has 2gb ram while 32gb g3 has 3 gb ram.
my question the roms available in LG G# androd dev section they supported both 16gb and 32gb or i need to flash different different roms for both models.
2gb ram or 3gb ram does not matter for me. i will choose the model which has more custom roms.