The WCHA Classifieds
Reminding folks that there are some nice canoes on the classifieds of this site... some are restored and some aren't. I looked through them to see if there was a Shell Lake to use as "an example" and didn't find one, but there are at least two nicely-done (per the picture) Thompsons, at decent prices for restored canoes... and examples by many other builders.
Also want to say something about "comparisons to Old Town": OT made many models over the years, which served different purposes... and even the same model, in some cases, changed over the years. Even if someone asked for a comparison between an OT guide and a Shell Lake, it really would come down to the specific canoe. One of the cool things about old wooden boats is their individuality-- including how they've been used and abused.
But, "the man on the street (or beside the lake)" may say you'd be wise to put your money on an Old Town, given two roughly-similar canoes for the same price, and one being a Shell Lake. Part of that is the "name recognition" Benson discusses in "how much is my old wooden canoe worth" in FAQs on this website.
For me, it comes down to "what takes my breath away, makes my heart go pitty-pat, and makes my brains fall out"... which is one reason we have seventeen canoes I guess. But the first eBay canoe I bid on and was upset about losing was a pretty yellow Shell Lake.
Kathy