I guess the XT beats the 2 other synths here. Q has only 2 wavetables and the sweeps are not so smooth because the waves included change so dramatically when you sweep the table (if I remember right). XT has at least 32 wavetables and includes user wavetables. You can build your own wavetables from only 2 waves. At least using sounddiver the 2 waves get interpolated to make a smooth wavetable. I guess that you can also tweak and mess with these wavetables most with an XT. It can do some really weird sounds. Don't know much about the TI's wavetable capabilities but XT is specialized in wavetables and I can say it's a beast in those sounds.
edit. XT has 64 rom wavetables + 32 user, 64 waves per wavetable.
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