How will shortening my wheel base feel?

I am going from an old 80s plastic plate to a nice Roll Line aluminum (Blaster). My current wheel base is 175mm. Roll Line suggests 160mm for my boot size, but they also have a 170 that will work with my boot. How will the feel of my skates change by shortening the wheel base? I’m a bit older and I don’t really want to get used to a completely new feel and all the joint aches that go along with that.