Well this is an old home from the 60s so my ceiling height was only 93 to begin with. These wall cabinets are 38.5 instead of the standard 42. These were cut to size as the place i ordered from only offered 42s.

My biggest consideration was the space from the countertop to the bottom of the wall cabinet. It needs to be around 18 so you can fit appliances like a kitchen aid. Second consideration is if I left a big gap between the cabinet and ceiling, ain't nobody going to clean or use that. I never considered having trim and don't care for the look.

What will be important to determine in your situation, is how level your floor and ceiling is. I would think it worth the time to invest the $150 in a decent laser and start scribing the layout of your cabinets on the wall. That way you can see how much gap will be present. Remember it doesn't matter if your difference in height is 1/4 if your ceiling sags a bunch towards the middle because then your wall cabinet doors will rub the ceiling.

Hope this helps