Bob, they are both great rides and fishing machines. Whichever you pick, you will like. Inherently, there will be several things about each that will cause discomfort. Just a given when you are a big guy in a short, aluminum, side console boat. Your right ear and shoe are going to be wet at one time or another. I'm a big fella with an 18' aluminum boat, I know, it's going to lean into the water to your side.
A 20' glass boat would be better, if a side console. It will go anywhere the 18' aluminum will, but be drier and smoother getting there. Me personally, if only fishing with one other person most times, a 20'-21' bass or walleye stlye boat would be my choice. Of course with these, usually comes added expense. Both with initial investment and operational and maintenance costs. Some of which can be offset buy buying a gently used boat. You can get a really nice boat in that 25k to 30k range.
If you are just dying to have a new boat and the budget mandates aluminum, you should strongly consider center console. Bay series center consoles, offer a much more comfortable and stable platform for us big guys. Most of the manufactures have several styles. I like the Xpress Hperlift series myself. Bay | Xpress Boats
Whichever way you decide, be patient and good luck.