The optics are better, so the image is likely to be better, but it likely won’t get you better accuracy. What you need for that is the camera to be in the same spot, every time, and to maximize the amount of the bed area you see in the camera view.
For example, this is the view in a typical red/black machine from the 160 degree camera, with the bed area highlighted in red:
All the stuff you see outside that red rectangle is wasted image. This is the same machine, viewed
through a 120 degree lens:
You can see that much more of the bed of the machine is filling the view, and if you include the bulge from the fisheye effect, very little is wasted, so this is ideal.
The lid, or the struts that hold it, are generally the weak point - if the lid opens to a place that’s 1 millimeter different from where it was calibrated, your placement will be off by that millimeter. Using something like a small steel retaining cable to hold the lid to exactly the same opening height every time, or a metal brace like you’d see on cabinet door, will likely improve the accuracy more than a better camera would, and it’d be cheaper, so I’d try that first.