Speed. Its all relative.
The new one is faster for sure but to learn and progress on there is nothing wrong with the 06. In fact, especially for a newbie you could make the argument a slower kite is better.
And there is very little change in the 10m- hopefully thats the kite you'll spend the most time on, so these kites should last you a while.
But if you really like we can swap 06 for 07 (er, + cash)