For those of you still curious on how Alt-Clark's looks differ from canon Clark, please check out this thread:
Alt-Clark vs. Canon Clark\'s Hair (or was it "Canon Clark vs. Alt-Clark's Hair"?) Anyhow, some great photos. The first one of alt-Clark is from "Tempus Anyone?", when he wore it more slicked back like Superman. The other three are from "Lois and Clarks" even one with Jimmy when he was impersonating canon Clark. You may notice back in "Tempus Anyone?" picture, he's wearing the black oxford sans tie (as in this last scene in Part 21) and a simple, non-colorful grey tie in the photo with Jimmy from "Lois and Clarks". Many thanks to DC and Andreia for supplying links and photos and illustrating my point so beautifully!
