You're comparing one of the best lines of lightweight handmade steel bikes ever made, period, to some piece of **** hi-ten steel budget brand. That doesn't make any sense. The 3rensho is a bike that is worth as much as you are willing to pay for it. If you buy it and take care of it, it could last you your whole life. You may never want to replace it. A large part of the price of a 3rensho, however, comes with the name, even if they do ride better than any other comparable frame (this is hypothetical. I don't really know, having never ridden one myself).

The Sparton is some mass-produced budget frame that nobody knows anything about, even now, months after first hearing of it. Also, the seat binder bolt on that blue Sparton looks like someone took the seat lug off of a 1978 Schwinn Varsity and glued it onto a "track" frame.