Wilson is perhaps the most accurate, but is probably slowest. Get the spud that allows you to power it with a hand drill.
I used a Forster for better than 20 years. It is accurate. I got separate cutter shafts and lock rings for different calibers. Get the spud that allows hand drill power.
RCBS has a cutter head that cuts to length, plus inside and outside chamfers. No experience with it, but it's probably as accurate as the Forster. There is a self propelled version.
Gracey is a big step up in cost, but is quick, but has some accuracy issues, as it works on the horizontal. Any turnings or dirt getting in the shell holder area will give a longer length. The original cutter only cuts to length, but there are aftermarket cutters that inside and outside chamfer too.
Giraud is the best there is, but is another bigs step up in cost. Operates on the vertical. Accuracy is to about .001". Calibers are quick change. It takes 2-3 seconds to trim a case, inside and outside chamfered. My finger tips get really sore inserting cases and giving them half a twist. Thousands of cases in an evening.