Reamp box

Oct 27, 2007
Montreal, Canada
What would be the difference between an active and a passive reamp box?

I've narrowed down choices between the Radial X-amp (active) and Radial ProRMP (passive). For the price (200$ vs 100$), is it worth to buy the X-amp or does the ProRMP will do the job just fine? Other suggestions within that price range?