Steeleye Span for me, but only really the first three albums (minus the rubbish Buddy Holly cover). The arrangements are rawer and more unorthodox, though Fc are probably the better conventional rock band. Some of the guitar playing on early Steeleye Span is almost like the Velvet Underground, which is a good thing in my book. Neither band are as good as Pentangle or Mr Fox, though...

The main problem with the overall Fairport/Steeleye/Albions sound is that it inadvertantly set incredibly limited parameters for how folk rock should sound now. It's an increasingly self-referential sub-genre that, with a very few notable exceptions, desperately needs to get out more. Essentially it's caberet.