sure, unfortunaltely compes and zones seem notorious for being hard to tell apart.
The difference in steel i mentioned could make for way to discern:
-Hi-ten should be heavier
...... (however theoretically this should work)
-I think a cromo would have a slightly wider seat tube diameter ....?
-THink a file would slide off cromo. (if there were a spot w/o chrome where you could test & w/o using pressure)
sooorry