Even with a bit of commission, it is a nice pickup in yield. More importantly, CCW is larger/more liquid and generally trades at a lower yield than CCS (by like 20bps). That means CCS will normally trade $1.50 below CCW.... so this should be an easy trade.
Or, you can just sell CCS and pocket your 13% over the past week! I like the swap better though, as 10% is a nice yield.