First time smoking a small brisket flat. With smaller pieces is it better to smoke at 225 for longer smoke or 275 for a faster smoke.

It’s a 3 pound pastrami if that makes any difference. It’s also a “lean brisket” so my thought was since there’s less fat to render 275 to be done quicker would make it more moist. Planning to wrap at 160 pull at 200.