I had to go look up your roster to figure out who "TT" was lol. I know who Terry is, but TT made my scratch my head.
Better upside for this year, or in the future? Terry for sure this year with Perry out. He's got a monopoly on opportunities as a RW.
Long term, I'd say Steel. Every time I've seen him play he's shown great skill in a few different areas. I could see Terry being the better fantasy player for the next 2 seasons though.