To trim or not to trim?

[M83T]

Hi all, I'm just getting to the end of doing my kitchen splash back it's my first real job for myself. I've done the walls under the units and now I'm on the the last wall which has no units so I'm wondering should I use trim along the top of the last row of tiles or will a nice neat line of Silicon look better? I'm using metros and have 8mm flat trim if I need it.

 

[WetSaw]

Entirely up to you but if you choose no trim use caulk instead of Silicon and paint it.