[1] I don't know about the software they're using in particular (Avid?), but there is a chance the Macs are actually faster than what you can currently get from PCs regardless of GPU - nothing atm matches the bandwidth you can get from Apple Silicon, ProRes hardware encoders, power consumption, noise
[2] it's not even actually irrelevant as the overall experience of owning a Mac, outside of the remote desktop client, will be substantially different.