Yamaha DTXpress/DTXplorer/DTXtreme

Just lucked into a new DTXtreme pad set (birch shell real head 
pads).  I'm now wondering if anyone here can/would like compare and 
contrast their experience with these pads vs the DTXpressII(which 
I've only had for a month and love).  Also, does anyone have 
experience in using these pads with the DTXpress module...

Thanks...