If you have a larger cutter, it may allow you more room to move the mat around and prolong its life. For example, the Big cutter has a 14” width, the Go! Has a 10” width and the Me/Baby have a 6” width. You have lots more room to positions the mat and still cover the die with a larger cutter width.
Still, some dies just take up the whole 6” width (I’m looking at you 4” finished quarter square triangle) and repeated use will run through mats faster than others. I think Accuquilt admits that the rag dies are particularly hard on mats.
And I love my Me cutter because it’s small size make it so easy to store. Even if it means buying more mats.