I would take 1 RTX 6000 Ada, but if you mean the pre-Ada 6000, 2x4090 is faster for minimal hassle for most common usecases
Also by “time” I mean my time setting up the machine and doing sys admin. Single card is less hassle.
There is the RTX 6000 Ada (practically unrelated to the A6000) which has 4090 level performance, that what you're referring to?
https://www.bhphotovideo.com/c/product/1607840-REG/pny_techn...
I would take 1 RTX 6000 Ada, but if you mean the pre-Ada 6000, 2x4090 is faster for minimal hassle for most common usecases