It can be a bit tricky to see how these two platforms perform against each other in terms of demand, since the word “Flex” is a broad term used in many other job ads than developer jobs and “Silverlight” is a very specific word. Still, after matching both developer and flex/silverlight at Simplyhired, I think its fair to say that Adobe has so far been winning the race.
Interesting to see how the amount of ads has picked up the last few months. Please observe that these stats are only from the US job market.