We are not saying something different.
Read again from the top of the page.
- You asked how to install a channel
- He said to use a "wad manager". (like on Wii)
- You asks which IOS you have to use
- I completed his information, saying "not any wad manager", you need one with access to NAND. Depending on how your vWii is hacked, there are two different way to get access to the NAND.
1. using a patched IOS
2. using AHBPROT
If You are using a Wad Manager working with AHBPROT, you don't need to care about which IOS to use.
But you can use IOS236 if you have it (but it's not needed if you have AHBPROT).
It's not contradictory information, it's complementing informations.