Harrison's did have toasters...but the current toasters are hotter than the original vintage toasters...but a nice reproduction.
I've had both...and prefer the hi-gains myself. I simply find them more versatile. YMMV.
I had a set of the high gain in a 620-12 and that guitar sounded great. No shortage of jangle. They may be "higher gain" than toasters, but by the standards of a metal humbucker, they're hardly what we think of today as truly high gain. More like mid-gain, I'd say.