Planning to buy a 1+1 here. need advice.

so im planning to buy a 1+1 next week buy when i saw Asus Zenfone 2 (4GB RAM) i kind'a thought if what phone to buy since the price is not issue between the two phones. additional to the AZ2 i saw in a site of GFXbench.com that 1+1 doesnt have OpenGL ES 3.1 support unlike the AZ2. can you enlighten me or advice me which phone to buy??