I dont have a ton of run time on either one yet. The one i got for my Primo was purchased from VEVOR. They were out of stock when i was ready to get one for my LR3 so i went with one off of ebay. I have no idea which is better. Main thing im learning is while the VFD comes with a manual its very broken english. I have had to ask several questions and do tons of googling to find out what settings need to be changed in the VFD and what not. I have a post now trying to get RPM where i can see it.
Also on my LR3 build thread there are the links to each of the spindles i have…
Hopefully that info helps you some. And if you follow along you can learn as i do LOL