You're wrong, there is a difference between a modded HD 6950 BIOS and a HD 6970 BIOS.
The VRAM chips are higher rated on the HD 6970 card so flashing a HD 6970 BIOS onto a HD 6950 card can cause problems as the lower rated HD 6950 chips can't cope with the settings from the HD 6970 BIOS.
A modded HD 6950 BIOS unlocks the shaders (if they can be) but retains the appropriate settings for the VRAM chips.
I said that being able to unlock the card was far from guaranteed and that's true.
I said there was a small chance of bricking the card. It happened to someone on this forum. No amount of trying to re-flash the card with the backed up BIOS would fix it so my saying "there's a small chance of bricking the card" is true.
Everything I said was correct and your response is wrong and an exaggeration of what I said.