Oh, hi again kbf. Welcome to part two of your flashcart quest.
Nah... that ain't it. There's a
post about identifying carts, but basically you want to look at the exposed part of the PCB and the URL.
Notice that the PCB of the
R4DS Pro has a 'floating' 7th pin and a yellow PCB. Now you can search for them on AliExpress (which usually involves opening many tabs to check the 'Color' options and prices).
Pro tip, they're currently listed together with the
www.r4i-gold.com
carts, making them easier to find.
(Anyway, that slightly new design you linked looks kinda nice... I wonder if there's any reason to get a
www.r4isdhc.com
.)