Ci sport should have the 18" wheels M V spoke alloys over 16's on the non sport.
They also have a few extra M sport styling bits plus a little lip spoiler on the boot.
Should also have an M sport steering wheel and the Laser Alcantara interior and Alcantara headlining [unless of course it's the optional leather].
Didn't realise they did a Ci SE? But SE's normal only difference is a few leather trimmed bits inside
Deffo go for the sport for resale value