Which of the two laptops has the better cpu?

Cu
- in Acer
3

Can the ram be upgraded for both?

which of the two is generally better (apart from the ram)

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An

The Ryzen 7 5800H is better. So the second laptop.

Cu

And how much mHz can the ram have? So how much is best?

Ma

The second has the better cpu, but is also 1/2 KG heavier.

In general, 17 inch laptops are rather questionable, as they are often too big for mobile use and you still need a stationary monitor.