So what is the "origins" now of SpiderMan?
Was he bitten by The Rhino or something?
Whatever it is. Tony could easily replicate the powers or the process if it was at all desirable for him (or yourself, in his place).
As for Pete's smarts, I haven't seen any demonstration of actual uber genius on the level of Stark, nevermind the type of things that Cho, Doom, Banner or Reed pull out.
Tony, Reed and Doom have the most resources and spend the most time at R&D, so factoring that it, Banner and Cho are even more impressive. Add to that the fact that Banner was persecuted, hunted, feared and pretty much full-time engaged in Hulk stuff, for him to have still remained far in advance of Reed in certain areas of physics, for him to casually assemble plans and execute them to humble Doom, Reed and many others ...
Banner's demonstrated his uber genius, Pete hasn't and doesn't strike me as anything more than Hank McCoy smart.