The Dragon wins hands down. The Cobra has more highs and mids, which the Dragon has but is well rounded compared to the Cobra, and the Dragon has an intense amount of low end.
When I bought my Mesa, the only reason I chose it over a Dragon was because they wouldn't budge on the Dragon's price and it didn't have a footswitch....the Mesa was $350 cheaper, in new condition with footswitch and head cover. I still kinda wish I went with the Dragon, but at the end of the day I got the better deal. The Dragon was $1200, and the Mesa was $850, I offered them $1100 for the Dragon since it didn't have the footswitch and they said no.