While mucking around on Home Depot's site, Elliott spotted this juxtaposition of smokin'/non-smokin' deals. It seems that the prices for the 20-piece router bit set is the same as that of the 10-piecer. He states the obvious:

I don't think they're going to sell a lot of those 10 piece sets.

I dunno. Maybe there's something we don't know about that 10-piece set. I'll have to stare at Home Depot's handy price comparison page for a while to come to a verdict.

Product Comparison [Home Depot]