GSR vs. LS/VTEC

okay i just picked up a GSR and i herd that if you convert the LS to a VTEC it will smoke the GSR. is that true? but also the process of converting a LS to Vtec is very time consuming and just for a b18 head its like $650+ am i better off with the GSR.

and if i do pick up an LS and covert to LSVtec if both my cars were boosted what would be faster.