In the other side it depends who made the re-tipping and with which kind of cantilever and stylus. It's a little weird what you said and probably the re-tipper made not a good job because if it's true that the re-tipped cartridge does not sounds as the originaal normally sounds pretty good but different when your ears are accustom to what you listen through in the past.
Anyway, that Air Tigth cartridge is a different matters and for it the best is to go directly with Air Tigth.
My advise is that with top LOMC cartridges we have to go direct with the manufacturer and not a re-tipper.
R.