Which one to go for?

@WallFlower26  That is strange; when I initially checked the configurations, they both listed Windows 10 as included.  (I even went back to the original page once.)  But you're right, it's not listed on the saved configurations.  You could have it added, or pick a different configuration, but it looks like the prices went up in the last couple of days.

I put the same hardware in both Cyberpower laptops that was in the MSI, as you requested.  Of course you could change the hard drives if you wanted, but as it stands, they each have two: a 256 GB SSD and a 1 TB mechanical drive.

Any mouse should work with any Windows laptop, excluding very old models that might not have driver support.  Even those are usually fine with the standard Windows driver though.

The Tracers do not have a disc drive, and I think they don't have room for one either.

If you like the other custom build company better, let me know, and I'll list the components to tweak so you can have exactly what you want.  I'd send you a saved configuration, but apparently you can't see it unless you login to the account that created it.