I was looking at both of these strut bars and the pricing and figured that the vibrant strut bar would be a great buy, but I was wondering is there a significant difference between the two (i'm asking because of the pricing - the GTSPEC is a 160 so yea)?

 

I wentwith the Vibrant, also because of price... bang for the buck, as it were. As I've said before, the chassis on modern cars are already pretty stiff, and the advantage of an upper strut bar is probably limited anyway.
Inotice it a little when in a hard corner. The front end plants a little better and so the rear comes around a bit better.But for the most part, it'saesthetics imo.
I am looking into a quick release kit for it though to make it easier to get it off and get to the battery.

The GT Spec will cost you a short arm and a leg compared to the Vibrant and I doubt that it's worth it. You'd be paying for the name... their reputation in the SC world.

 

I got the vibrant and noticed a significant difference in cornering. Definitely a great buy for under a hundred bucks, plus its easy to install. im not too interested in a quick release kit to get to the battery - i never touch the thing anyway.

get the vibrant, everything else is just a rip