I did actually answer that question more precisely and without conjecture in the first post, but apparently now we can't even expect people to *read* so... oh, well.
Anyway, the settings on your Maxon have some impact - I'm under the impression that the Boost feature on that pedal is the 'normal' TS-type thing, and it should be noted that a lot of variants and mods just get rid of the mid hump. (Some people want it to be their only distortion, others want thicker leads and don't tune so low or use so much gain, et cetera.)
On the TS7... the bits are actually the same, and the components in a TS9 can still be wonky enough that I don't expect much of a difference in general. However, as much noise as you're describing indicates that something somewhere is horribly wrong.
Searanox, if you're commenting with 'pretty similar' regarding how the TS7 and TS9 are related, you just don't know enough to be of much real help. Build quality aside, handwaving things away with 'pretty similar' - and not 'same circuit with a boost switch' - is the kind of sloppy nonsense that leads to guitarists not knowing the first damn thing about their equipment.
Jef