Thanks for the compliments, all. I think that - as Blue Frackle says - because he's not replicated all that often (and doesn't get as much screen time as some of the others), it's probably a bit easier to make a Swedish Chef that looks "around about right". If I look closely, the lower lip size is smaller than the current Chef (though about right for some earlier ones), the skin, nose and hair colours aren't exact, and overall the whole thing is maybe 5-10% too large.
Still, overall I'm pretty happy with him. Next step will be to find someone with larger hands than me to convince them to stick their hands in some alginate so I can take a cast.