Are iPhone 5/5s graphics any different from other iOS devices, such they'd affect lighting?

I have been making a game that uses a couple spotlights to light up sprites during certain events. Strangely, as far as I can tell, on only iPhone 5's, the spotlight intensity is way brighter. On other devices I've tested (original iPod touch 5th gen, iPad mini, iPhone 6), the light is normal/same as in the Unity editor.

Also, may be related, but the spotlight cookie cutout does not work on any device.

The blown out sprites just have the basic Sprites/Diffuse shader (the trees at the...

Are iPhone 5/5s graphics any different from other iOS devices, such they'd affect lighting?