Similac formula

Breastfeeding didn’t work out, so we are formula feeding our 7 week old.

Little one started on Similac Pro Advance, but we had to switch to Pro Sensitive for tummy issues. Similac sent me several sample cans of different types, such as Total Comfort, Sensitive, etc.

What my question is, can the baby try different types, or is it better to just stick with the one that he’s already on? I believe the sensitive and total comfort are both for sensitive tummies.

Thanks!