i'm not saying having a different chip (which some of the ts9s had, i think) makes no difference, as i had a biyang ts-alike which had swappable chips, and they made a noticeable difference. I'm saying more what you're saying in the second paragraph, which is that, assuming the same chips, i wouldn't worry about it. :)
My own TS9 ('81) doesn't have the "correct" chip (cr@p, I shouldn't say it, now I won't be able to resell it for 300+€ to a corksniffer xD), and there are no more difference between it and a reissue than between 2 reissues - they all basically sound like a TS9. I've A/B tested my TS9 with the TS9 version of the Custom Screamer and while there were more differences (the Custom Screamer sounded way better to me - more opened and organic) they still both had the TS9 character. Then I rewired the Custom Screamer in TS808 mode and the difference was (to me) much more obvious.
Especially when you consider the differences in price between the 9 and the 808- or maybe more importantly, between them and the cheap clones, which ironically often use the "right" chip.
Yeps. The TS (9, 808 or whatever) is a dirt simple and well known circuit, there's NO "special mojo" to be found in the old ones as far as I'm concerned and a clone with better quality componants will sound, well, better. Sorry for stating the obvious :mrgreen: