Not exactly...
While I guess you could say that their feats are the same for the purposes of this thread (i.e: NES games only), it's not quite accurate in the overall canon. Samus as a character has feats of strength, speed, and other attributes that are far better than Pit's, though they aren't apparent in the original Metroid. For instance, Samus can wall jump and has supersonic reaction time in Super Metroid, can lift multi-ton creatures in Other M, and dodges gunfire in Prime 2 and 3. None of that can be done in the NES Metroid, but would you say that Samus can't do it? She's the same character in all the games, but looking only at Metroid limits those abilities severely.
However, given the rules of this thread, Pit and Samus are effectively equal in all areas, at least physically. Equipment wise, they're a bit different in that Pit can fly while Samus just jumps ridiculously high.