You're right. Touché. It isn't just the same factory in most cases, though, it is the very same manufacturers, and I can't imagine reputable frame builders would sell shoddily-made frames at lower prices when they have a reputation to uphold. My Windsor frame, for instance, was was made by Kinesis and bears their logo.

I am interested in knowing where the Spratt Cycle brand frame designs come from. In other BikeForums.net posts, users have sworn some Windsor frames are the same as some Fuji frames, sometimes from older model years. The bicycles are less expensive, so it kind of seems like they could be buying old/obsolete frame designs from other manufacturers. If anyone has any information on this, please post!