XPS2 v XPS2 DR on NDX

Hi there my XPS2 is a 2007 model and I would be sending for service next year. How much of a difference is the DR version v the non DR version. 

I did done the same with a Supernait with a DRd Hicap and this was well worth it. 

System is 82/250.2/SC PMC Fact 3s