Zenfone 2 Deluxe custom rom - question about model variants

My phone went dead and a friend gave me his old Zenfone 2 Deluxe, which comes with the terrible ZenUI and a million asus apps that are a pain in the ass. I wanna throw it away and install a custom rom, something as clean as possible. When googling, however, I find a lot of custom roms for Zenfone 2 laser, and for Zenfone 2 Z00A. According to Google, Zenfone 2 Deluxe is ZE551ML, however in the settings it says the model number is Z00AD. I'm very confused about this. Of everything posted on xda's zenfone 2 forum , it's very hard for me to understand which roms I can install and which I can't\shouldn't. Please advise, how do I proceed?