I have two JF AP tourbillon and was thinking about the R8 as well. The black R8 AP tourbillon in black DLC does have the new silver tourbillon. I spoke to
Shylock Eins about his R8 AP tourbillon black and he had good things to say about it. Keep in mind the AP gen tourbillon is gold colored and the black ceramic gen has a silver tourbillon.
My recommendation is to pick the brand and style you like best. For me the Roger Dubuis is not my favorite style and the JBF one and BBR is very nicely done however.
I don't think JBF or BBR makes any AP tourbillon so you are limited to either JF or R8. The R8 is slightly thicker than the JF so I have purchased the JF versions. I have the blue and grey dial JF AP tourbillon and they have run well.
I will get either the R8 black DLC or a rose gold JF AP blue dial as my next purchase. Good luck with your decision..