I've got an A48, and I tried a TT (and TL) for about two weeks. For my uses as a third (center) channel mic for solo acoustic and classical guitar, the A-48 is bright and tight. It certainly has a vintage vibe to it. It is tempermental with placement, which might just be another way of saying it may excel in certain applications. Dunno, as I haven't tried it on anything other than 6 different guitars. The TT is smoother, more neutral and I would suspect more versitile. The proximity effect of the A48 is less pronounced. The mic has a tight bass and a tight midrange. The highs are a bit smoother in the TT, and I could see where the A48 highs might be a little much at times (although off axis sourcing mitigates this). The TL is a very nice mic, basically the FET version of the TT. Very similar, more neutral. Certainly not boring.
Hope that helps.