I don't see any problems. To get a QTC of 0.707, the DVC version wants a bigger box ~0.9cuft and the SVC version wants a smaller box ~0.35cuft. I think you both did good simulations. Maybe you're confusing which sim is which?
For fun, I ran some sims with my tool at 600w below. The displacement scales are not the same, but you get the idea.
edit: fixed left/right oops