Lenovo k3 note k50 custom and stock roms

I checked Rom vibeui 2.8 1532 and 1533 and s117 and nexus 5
best Rom between top roms is vibeui 1532
battery friendly
speed is good
no lag
Rom vibeui 1533 high 🔋 battery drain and nexus 5 Rom too.
Rom 1532 free memory 1.2 gb
Rom s117 haven't free memory more than 500mb and few option is good:
1. phone and sms app great work 👍
2. smoother than other
but antutu benchmark is 45000
in nexus 5 Rom antutu benchmark is 46300
in vibeui 1532 is 46150