which FAT ti? the serotta built later models were better made if I'm honest, slightly stiffer, tighter angles & jigged for suspension forks & more of the tubes were machined for a supposedly smoother ride(more later). this is how chris wanted to build his ti frames from the start but it took a while to work it all out... plus the massive costs involved are 1 of the small reasons that led to FAT closing shop.
the earlier, original FAT made tis vary massively in welding quality, some are amazing, some not so great. mine broke at the BB weld due to a contaminated weld apparently. the originals were generally much more desirable, but going by the current pricing, the later serotta models have caught up.
the earlier sleeved & gusseted FAT tis had the best ride quality, that weird blend of stiff in the drivetrain, yet surprisingly smooth in the rough. the only ti frame i've ridden (& I try to test ride a lot) since, that is as smooth in the rough is a GT xizang, but its nowhere near as stiff in the bottom bracket.
the magic IS in the brand name, deffo marketing appeal. BUT, if you like the ride of short fork length rigid forks, then the early FAT ti ride is pretty special also. the sleeved tubes also add to the coolness aspect.
I rode early FAT ti from 92-98 & later serotta from 98-2004 (sold it earlier this year through lack of use). despite my now suspension loving ways, if the earlier FAT hadnt broken I would have kept it. the later serotta built just never had the same ride feel, stilll stiff in the BB, but nowhere near as smooth in the rough & for me never had the same appeal as the earlier FAT. my current Titus Ti winter hack handles the same, cost less than 1/2 what the FAT tis are making, has a lifetime warranty & IS better made...
wendyl told me later chris eventually managed to repair my original FAT ti & kept it for himself.
honestly? If I suddenly wanted to track down a short rigid fork length early ti builder I'd look for an early merlin. perhaps no surprise given the FAT/ merlin history but the merlin handles pretty close & I'd trust the welds a lot more.