Originally Posted by
klausien
They look similar enough in pictures, but the two systems are actually different sizes. The AV Famicom is a bit smaller. I haven't opened it, but I don't think the screw holes in the board are the same for both either. Even if I did, it wouldn't matter because I traded away my Top Loader when I got the AV Famicom.
The NES carts would stick out just as far on the AV Famicom with either case due to the necessity of a 72-60 pin connector. I wholeheartedly recommend going the AV Famicom route over the Top Loader regardless. The increase in picture quality, ability to play games with custom memory mapper chips (Castlevania 3) and peripheral compatibility (disk system, 3D glasses, etc.) make it a much better system for the Nintendo fan. Of course, there is always the good ol' Toaster with a new ZIF connector. THAT is the best way to play US games, bar none.
One note of caution though. Be advised that you WILL need extension or replacement cables for the controllers with the AV Famicom. They are PC Engine length, if that. At least it comes with TWO dogbones.