I use this to carry my MBP14 or my M2 MBA. Works great for both. I chose it because it has a separate compartment for the laptop, sufficient storage for other stuff, optional top handle so it can be hung on a hook and a clip for my keys. Plus it's nice looking. The full size sling holds the MBP14 perfectly but wouldn't be big enough for the 16.
Just look for actual reviews of such cases with Google. That will give you much better information. So you can decide whatever "best" is for you. We can't know what "best" means for you.
I tend to use anything made by SFBags (Waterfield Designs). Their bags wear like iron. I use the Macbook Sleeve Case which technically isn’t a bag but it works for me (horizontal with strap).