In Simplemining my 5700s / 5700XTs show 80 to 120 Watt for 50 Mhs, but in reality they take around 150.
The 3060tis (i have 6 different brands) take 125 Watt and all do a minimum of 60 Mhs.
So if you can get a cheap (compared to 3060ti) 5700 / XT - go for it.
Otherwise i would always go for the 3060ti.
Besides from ETH the 3060ti can do much more algos faster than the 5700 / XT.
Buying a 3060ti means to have a plan B if ETH is done - in a few years....
My hashes on the 5700 / XT are always not stable over 50 / 51 MHs so i kept it there.
@Mighty_Crypt
Might be you read my post wrong or / and my english gave the rest.
Please dont be this agressive. I and all others here do our best to help.
i think same as you 3060ti is good pick in future we cant mine ETH 3060ti can mine other algo more than 5700xt
and when selling to gamer nvidia card is easy to sell more than amd