Yamaha DTXpress/DTXplorer/DTXtreme

I saw this ad for a DTX2 Module here: http://www.harmony-
central.com/Drums/EDW/modules.html

It is described as follows:

Yamaha DTX 2.0 NEW  [website is copyrighted 1998] 
Voices - 1044, fully editable 
Drum Sets - 64, 32 user programmable and 32 preset 
Trigger Inputs - 12, (8 stereo + 2 stereo piezo split) Also 1 Hi-hat 
and 1 foot switch 
Built In Sequencer - YES 
Hi-Hat Nuance CV - Full 
Cymbal Choke Capabilities - YES 
User Adjustable Effects Processor - YES 

I suppose in most ways the new DTX III module would be superior to 
this one.  How would the two compare?  

I just recieved an offer to buy a DTX2module with some Pintech drums 
for a cost about equal to what a new DTXIII kit would cost.   The 
seller bought the kit new in 2000.   I'm thinking it's probably the 
old module, but I'm not sure yet.  I asked him via email but haven't 
heard back yet.   I am shopping for a used kit which will be my 
first edrum kit.   If the module is the old one, I don't think it 
would be such a great deal.