The flat bench allows you to put up more weight for increased muscle mass than the incline bench. If you are looking to just be able to put up more weight, then the flat bench will do that for you.
Flat bench presses. As mentioned, the pectoralis major is comprised of the upper and lower pec. When flat benching, both heads are stressed evenly, which makes this exercise best for overall pec development. The flat bench press is a much more natural fluid movement, compared to your everyday activities.

A utility bench, or a bench without an attached rack, is a key piece of a home or commercial gym. You can slide them into a power rack, do dumbbell work or do other exercises like pullovers that don’t need a rack.
In another article I described why you should get some kind utility bench like this, rather than an Olympic bench.

But the question now is, should you get a flat utility bench or an adjustable flat/incline/decline (FID) bench?

The difference is the adjustable one is composed of two pads – the seat pad and back pad, which allows the back portion to be swiveled up at an angle for doing incline or decline presses.

Your first instinct may be to get a FID bench. After all, that means you can do more exercises, right? Sure, that point is hard to argue with. You can add incline and decline presses to your routine. But consider these points…