Originally Posted by
hollismb
Hi-Temps are also slightly smaller in diameter than a standard plate (17.5" vs 450mm/17.72"), and less accurate in weight compared the the HG plates, which are +/-10 grams. They bounce a lot, and aren't always consistent in texture/width because of how they're manufactured. But, Tom is right, they're bomb proof, quieter, and easier on floors, although you should probably get some stall mats or build a platform to protect your floors and your equipment anyway. You can only get 405 on the bar with Hi-Temps (with collars), but 455 with HGs.
I don't know enough about their new cheaper Econ plates to comment on them, but I have sets of both the Hi-Temps and the HG's, and prefer the HG's for most of the reasons I mentioned. Also, if you end up ordering a bar/plate package from Rogue, they'll sub in HG's for you if you decide that's what you want (at least the last time I ordered a package from them, anyway).