Wow thanks for that link, it was a very interesting read.
Well after reading all that, it did make me more tempted to have a closer look at RMFRP.
But after some thought, I will stick with RMSS.
It looks to me RMFRP has similar information spread out over more books.
I personally prefer my rules in as few books as possible (with the exception of the Essense, Channeling, Mentalism books being separated, which is a great idea).
There are quite a few differences between the rules, but nothing major that would tempt me to actually buy a new rules set.
Actually having said I had all the RMSS books, that's not true at all.
I meant to say core rules, being RMSS core book, Spell lore, Arms lore, plus non-core being firearms lore, underground races.
I don't have the talent lore which in that link seems to say it's one of the more central books.
TBH, after reading about it, I'm not sure I particularly need it, although I'll probably buy it if I see it in a games store just for a read.
I also don't have any of the other many expansion books (apart from the ones I mentioned), but I don't really need them either.