The Intel GPUs shared RAM too

Which makes it worse, Intel Macs look appealing than these.

Depends what you need it for I guess, and how much differently ARM uses RAM than Intel. Anyone know?

Also how much OS X optimisation can help with that. The iPad Pro is a lot faster than most laptops with, what, 6gb memory? And iPhones always seem to have a lot less RAM than Samsung phones but still run faster.

iOS doesn't use swap, it just kill background apps when it needs to devote the whole RAM to a single app; iOS apps are designed with that in mind.

MacOS doesn't get to use any of those tricks.

It's mostly the same, perhaps a little bit less.

It could even be advantageous