I have Dexter SST6 special edition, SSt6LX, SST8 and 3G tour ultras and they all seem to be the same in sizing.
I also have a pair of SSt 5’s which are slightly more narrow than 3G Tour Ultras.
The original dynaroos were a similar size to the SSt 5’s so I’m wondering if since they went to 3G then the widths were changed slightly.
As for best the Tour Ultras are as good as my SST6LX’s and if you can find better then I’d be very surprised. The dot sliding sole is phenomenal.