What do you mean by "twice as much experience"? Does it makes you twice as productive? or just twice as much "time"?

If you are more productive, you can try to get more- but take into consideration:

1. You should have hard evidences that you are more productive- developers tend to think that they are better/have more experience then others at their level.

2. You should know your market value outside of the company and act according to that, not just your co-workers salary.