difference between Quick compilers

I know I have Quick Basic 3.n, and maybe even Quick C somewhere. Quick C had become popular w/developers (not for primary use) long after M$ canned it. Not sure why, maybe they just liked the IDE. And liked using it for quick and dirty tasks. I spied QB 4.5 on eBay, brand new (someone placed a bid, I won't at this juncture). Is there any big difference between early versions of QB or QC? Early version of Visual C++ for instance are doggish compared to later ones, but that's a different world. What about other M$ products, like Professional Basic (as compared to QB)? Any Borland/Turbo fans still out there? Already straying offtopic, a book I own states that Delphi could be used to write Visual Basic, but not the other way around. I'll assume Quick C could be used to write Quick Basic, but what about the other way around?