Lots of pros and cons on each type. Big diff in $ too. To buy, operate, tow and maintain. That part aside for shallow water single poling

Tin - louder, more responsive to trolling motor input, all else equal (and it never is) will get shallower or at least be easier to get unstuck if you bottom out. It is much more affected by wind generally.

Glass - quieter, takes more thrust to move, but move less in wind. Will tip less as you move. Generally will get very shallow depending on the make -just as or even shallower than some tin boats - ever notice the most popular saltwater flats boats are fiberglass, but that's a different animal. Trouble is, even with a TM, it is possible to ground one that is work to get off.

All that said, if I could only own one boat, it would be glass, but if need at least two trolling motors.

Wannabe...