Don't know how you read that from what I wrote.
I'm saying that if you're doing 24/7 mining with your card, you'll probably care about the power usage relative to other cards, whether they're from the same manufacturer or not.
Also, no one does bitcoin mining on GPUs any more since people started widely deploying FPGAs and ASICs that are far more efficient making it pointless to use a GPU at all. If you meant Ethereum mining, I don't know of anyone doing dedicated mining who uses Nvidia hardware (unless they're just casually mining with their gaming GPU) since AMD tends to have a massive performance advantage for that particular application.