Bear in mind that both of those in Canada are NOTHING, ABSOLUTELY NOTHING like the stuff in the USA.
Hydroxycut, Cell-tech, all that stuff is a different mix when sold in Canada. In Canada it can not contain ephedra, creatine, glutamines, etc. The advertisements in mags are all the USA blends with all the goodies. In Canada they are different.
I would suggest ripping out one of the ads (and aside from wiping your ass with it), taking into a supplement store and comparing the ad, with what you are buying there (ingredients,etc.). You will notice a huge difference.
If you're in the states...different story, but I notice you're in Canada.