But that "Excel" thing might be an answer: the laptop must be running Windows, and Windows users often run an antivirus, and some Windows antivirus software is known to be terrible. (The MS-provided basic antivirus was always fine in this regard, though.)
This seems a drastic response.
Galaxy S9 has 2 X 4 Core @ 2GHZ , my corporate laptop has an i5 from 2015 with 2 @ 2GHZ.
I'll go with the Galaxy.
So Ghz is Ghz regardless of x86 or ARM as thisvis just the clock speed.
Another discussion is how much work is done each cycle. For that you might use GigaFLOPS or TeraFLOPS (10^9 or 10^12 dloating operations per second) or another absolute measure of performance.
All these things take way more energy, so your laptop will also have much bigger battery.
On the other hand, there are laptops, that have cellular radios. My old Thinkpad surely does.
Depends on what you're doing with these 10k rows, though.
it's like comparing the revs of your cars, it's just the cycle rate, not the Instruction rate