Okay, here's my summary:
Why do a LS swap.
Easy simple power in OEM format
Tune-able and can produce silly power without spending a complete and utter fortune to get there
Sounds epic
Comparing like for like, slapping a SC on a stock VQ you are held back by limitations. The LS, you have greater scope to increase power. The VQ needs a wealth of supporting modifications and there's a lot more to maintain.
Forge the VQ, you are opening yourself up to potential issues. The builder, the parts, the tune are 3 elements in which you trust will continue to run safely. Add to this the additional add-ons to make all this work, you're looking at a heavy 5 figure sum, including the SC. These also need a lot of care, and you're likely to be listening out for the slightest whistle, knock, bang or anything. Ask all forged/FI'd car owners on here if they are on the lookout for that tell tale knock or bang.
LS - Forged, and running immense power, because now you're winding up the Turbo or SC and you're looking at 800bhp+ that's not far from 3 times that of the VQ and just double that of the LS.
If you're looking for silly power, LS all the way.
If you're looking for an element of less risk the LS all the way.
I've run NOS and was about to hit the SC route, but put off by the amount of cars I've seen on OE blocks dealing with little issues here and there. High intake temps, belts snapping, this doesn't work, or that doesn't work. It put me off. You've then also got only a small handful of tuners for the VQ and one of them would never see me at their establishment to tune my SC, or build me a forged block.
So hitting the ground running the most enjoyable route, IMO and for ME is the LS route. Fit's my needs, and will be exciting to develop my car to the next level.