That's pretty much it. The H-200 are highly recommended for metal due to that tint, while it still retains a lot of detail. Many, however, don't exactly like said tint, due to it making most sounds around the 10k region become too hot, sometimes unbearably so. The Hybrids excel at taking the electric guitar sound to the extreme, which sounds amazing in imo, but the untamed energy also becomes a problem with a lot of songs as well, especially if the song calls for a certain amount of finesse or control, ie melodic metal(core). The FX850 has no such problem, it's treble still has more than enough energy and sparkle to satisfy any form of metal or high energy songs without going too far over the top, as is the case with the H-200. Basically the FX850 has control on top of it's amazing capabilities, while the H-200 is an untamed beast(sometimes too much so), so if you didn't like the extra tinge the hybrids had then you probably wouldn't miss them at all. I know I don't.
My H-200's are peakless with the help of the tips I'm using and I love the sound. But youre description of the 850's is throwing my lust of for them over the line lol!