Cometic or James 5 hole derby cover gaskets?

[troop]

Gonna be buying some 5 hole open style derby cover gaskets for future use. Any preference for James with the silicon bead or Cometic with their more rigid type material? I'm using a 1/4" spacer with my AIM/derby cover so need to use two at a time...

[Lew]

Both are first rate gaskets.  I'm a bit partial to the Cometic gaskets as they seem to be more forgiving with reuse.  Never had any problems using either brand though.