I've been over this a million times @_@. The TS9 has slightly more gain and a bit more "bite" then the TS808.
i have a hot rodded TS9 for sale at my junkyard. check it out!

^your "slightly" is very slight. with an IC swap, they just sound the same.
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The difference amounts to two resistors and a different IC. About $3 US worth of parts, give or take a buck depending on where you buy.