Ultrasuede or Lacey's Stiff Stuff?

I am busy planning my collar, and after my blue shell cabachon cuff I am having a rethink about which materials to use.
I usually embroider on ultrasuede; it feels great to the touch whilst working, comes in many colours, is flexible and as with my cuff, it can be left unbeaded as part of the design. I started using it as an economical option - I bought a pack of about 100 off-cuts from the US, which are perfect for pendants and smaller cuffs. Now I'm moving onto larger beaded cuffs and collars larger sized pieces are needed.
During the beading of my cuff, it became easier to stitch the more surface I beaded, and the stiffer it became. I also doubt that the beadwork would have needed as much manipulation to attach it to the cuff blank if the beading foundation had been stiffer. It will be interesting to see how the shrinkage compares between the two foundations and a nice option to be able to draw on a design to bead on.

So despite resisting to start with I'm going to order some Lacey's in the largest size and go from there.