I cannot compare Shotscope V3 to others, but I can relate what I believe to be its strengths and weaknesses.
Shotscope works best on full-swing shots. The aggregate stats are very insightful, both for length and dispersion. But... one must be sure to tag shots as "positional" when, for example, one punches a 4-iron from under trees into the fairway or else that shot can erode the full swing 4-iron stats.
One should be diligent entering the number of putts. And even then, much post-round editing may be needed to reflect distance and direction of putts. I find it more trouble than it is worth so ignore putting stats excepts for gross number of putts per hole. I do not need Shotscope to tell me I stink!
On course the watch is useful. Its yardage will differ from partners phones by 2-3%, but I believe the Shotscope is more accurate. That said, some phone apps give more intuitive depictions of trouble (water, traps, etc.). The new layup numbers are useful.
Shotscope club RF buttons are a bit fragile. They break off (for me) maybe one every 20 rounds. I now epoxy them to the butt of each club and when I need to regrip, I will need new buttons. But the price is reasonable.
The aggregate stats are the most useful. The "Performance Distance" figures toss out obvious mis-hits for each clubs yardage stats. (Note to Shotscope: It would be instructive to know what percentage of each clubs strikes are tossed out for Performance Distance. IOW, how many mis-hits do I hit?).
Overall, I am very happy with Shotscope V3. For $250 this holiday ( Practical Golf), I endorse it.