I'm currently looking at potentially buying a new laptop, something small and lightweight which I can use for some relatively light stuff e.g. browse a few websites, manage some webuis on lan, some utilities e.g. ssh, odd video, etc. which sits between my tablet and my laptop.

Two models I'm considering are:
HP 11-ak0027na
https://www.argos.co.uk/product/9626306
Asus E210MA-GJ181WS
https://www.argos.co.uk/product/3930823

As of now, the main differences I'm aware of are that the HP has a quad core processor whilst the Asus has a dual core but the latter apparently also has a spare internal M.2 slot which can be use for storage (or in my case, multi boot Windows and Linux without relying on the emmc/mSD slot, which offers potential speed advantages).

So my question is, on these low end machines for basic stuff, is the N4120 quad core that much of a boost that it's worth losing that spare M.2 slot?

I know from benchmarks that obviously the N4120 is better at multi core tasks, but I don't know if Chrome/Firefox would really benefit unless I have many tabs open.

Note: I've considered Chromebooks but with the limited Android support and other restrictions, I'd rather get a generic X86 machine and do something with that, even if it's something like Chrome OS Flex.

Thank you.

Update:

I managed to find a laptop on ebay (Thinkpad X280, i5 8250u, 8GB RAM, FHD screen, 256GB storage) which is light enough to be within my tolerances and the seller promised at least 50% battery life (roughly 4+ hours according to some reviews I saw) for about £120 thanks to some discounts/voucher and a returns policy.

Hopefully it does what I want and should be better than the above.