I love my '72 Twin which I have had since 1990 but if I was gonna get a new Fender it would be a reissue. So far I've only had the usual problems, recapp, re-tube, clean pots and so on. But an old amp is well, old. And you are likely to have problems with it. Get a reissue today and it might just last nearly 50 years like mine so far has.
If they are indeed built to the same specs then they will sound the same regardless of point to point (bs hype) or PCB. It's possible though that you may hear differences in the vintage one and consider it to 'sound' better because the old one has leaky caps and a bad power supply.
