Any differences between Jean and I can be found by reading this thread.
As far as my pricing goes, consider my costs. I don't redo an existing turntable. Rather, it is a new design that uses a lot of exotic materials, involves a lot of time to make, requires travel and the help of specialized vendors. It's expensive, but I make no apologies because I'm trying to break new ground. Hopefully, something will come of it that will apply to more affordable turntables. Meanwhile, I continue down this path...seven years and counting.
Just so you know, I haven't made any money. Still, it's a passion.