The Dynastar Speed Course Fluid is the second in the GS-like line of skis at Dynastar. It is a very similar ski to its brother the Speed Course Pro R20 Racing. With just a 40gr. difference on the weight, it is very easy to think we are talking about pretty much the same ski. The manufacturer fails to explain the difference between them. They both use the same technologies, sandwich construction, dual core, fibre-metal reinforcements, etc. So… the difference could be minimal as some lesser use of fibre-glass, a thinner metal layer or it could be none.