Every man and his dog should be able to win a handful of tourneys if they are, say, 45 to 100 seater type affairs. If he brags about his wins it probably means he is just suffering from a little 'post victory elation'. Any subsequent cold streak will soon put the old ego in check.
Poker is a very fragile game, where we often exploit relatively small margins, so bragging after victories just tends to indicate a degree of inexperience rather than any degree of great ability. And on that point I wouldnt therefore be concerned that he is 'better than you'.
Winning a handful of tournies at say the 500-1000 people entry levels, and converting a good ROI over a large dataset of MTTs, well that gets into the possibilities of a little more class. Unless he has say 500 MTTs where he has sustained some decent stats, then i'd say he was just talking through heat, having yet to experience much cold.
A good indicator of ability I like to use for MTTs (as well as ROI%) is the % of times that someone finishes in the top 10% of the field over a large dataset. 15%+ definately signifies class. The best player I have ever come across achieved 24% over a 1000 MTT dataset (along with a 154% ROI). It would be interesing to see where he ended up after 1000 MTTs
Personally Shine I think you are much much better than him . Dont let him tell you different.