As mentioned before. Vegas needs playing with timings that takes alot of trial and error and ALOT of time (specially the gigabyte gaming oc, wich is terrible to work with). And i guess 1080TI are pretty straight forward.
1080TI use to much power for this small hashrate and the hashrate decrease every new DAG Epoch. Use 2060 Super instead, they only use 115w and can do around 45mh. Used cards are available for less money than 1080Ti´s
The Nvidia cards all day, they work better with no driver issues and they have low temp compare to AMD, if I have to buy AMD card today it will be the newer versions not the old architecture, I'm talking about the likes of rx6600 and others but since this is between 1080ti and Vega I will surely go for 1080ti
The GPU temp depends on every GPU and Subvendor. My AMD cards are always under 60°C.
Going to choose from few old GPUs from a friend of a friend that needed money and want to sell them, what will be the better decision between 1080ti and Vega 64? Which one is more durable for mining and give less stress or troubles?
Vega Cards, use less power, hashrate will not decrease very DAG epoch and they have more hashrate than a 1080ti.