I like both Farner's and Brewer's voices, they were totally different, but sounded good on their own and together. Sure, Farner has the more impressive range, but Brewer's voice is more natural. I knew quite a lot of people who couldn't stand Farner's overly dramatic vocals though I'm not one of them. He always did remind me a bit of Uriah Heep's David Byron and vice versa, they had a similar tone and intensity. Close your eyes and its easy to imagine Farner singing Byron's vocal lines in
Stealin' at 17:54 (Farner sings less bum notes live though!):
The first verse of Some Kind of Wonderful is taken by Brewer, the second one by Farner, chorus is sung by both, the third verse has them trading lines - and it's IMHO the best version of that song done ever!