Mmmmk. So I'm sure if you look at all the howto's that show you how to rip Wii games WITH A DVD drive in a PC, and burn the resulting DVD ISO'S to a DVD-R, and they play perfectly in the wii with a modchip are full of it.
I'll admit it is possible that the reading is done from the outside in, which would explain why it takes a DVD drive in a PC almost 3 hours to read/rip it using drive debug code.
Never the less, the discs/lasers are DVD lasers and discs. Regardless of which direction the data may be recorded. Go check afterdawn.com forums under nintendo wii, those howtos on ripping/burning wii discs and gamecube discs work.
Or, you can look for a logo on the back of the box. Clearly the most technical means of looking into this.
Looked into it more, you're right, the disc in both read from outside in. That's the only difference, they are dvd lasers and discs. Once you rip the wii dvd's with the rawdump tool (which I assume makes the specific LG drives it's designed for read backwards), you burn the resulting dvd .iso using a standard dvd drive/dvd-r. Nero, or any other program can be used.