Pilsner DME (or Extra-light DME) uses Pilsner malt as its base malt. Light DME uses pale malt as its base. Pilsner is lighter in color and tastes a little different - not a huge difference, though. Methinks it's more appropriate for the style of beer you are brewing than the light DME.
The Fiesty(sic) Goat Brewery est. 2007 & Clusterfuggle Experimental Ales est. 2009
Planned: sLambic II, Flanders Red II
Primary: Fat Man Porter, Orange Blossom Mead, sLambic I
Secondary: Flanders Red I
Kegged: 3 different ciders, Janet's Brown, Barrel-aged Stout, Hallertau Blanc Pale Ale
Bottled: Flanders Red I