Where is the catch?
If you're in Lightroom all day, or compiling code all day, the Intel chip is probably faster.
Maybe is the Apple's chip more limited in multithread tasks vs Intel's one
It would several times slower, yes
reminds that my pixel pro cpu shutsdown if I have a whatsapp video call longer than 20min in 40C.
It will have proper cooling and a higher TDP.
Will be interesting to compare it for sure!