I assume setups like these can’t tow at all?
Theoretically... you will be able to tow just as good if not better than your HP turbo.
I towed with my KC s2r/s476sxe with 250/75s and had zero issues. Seemed to tow just like a normal KC s2 turbo
But the stage 3 is much harder to tow with... but still doable as long as you keep your rpms up (similar to non-vgt)