... alot of the actual features within DBpro can also be found with DB Standard and Enhanced ...
the actual language is the same setup, so it isn't a big jump from the products.
The most major differences between the two is that Professional is a much faster with 2D and 3D Rendering, and due to it being compiled the Math and Code also run considerably faster.
Apart from speed another good update is the Variable Type definitions, allowing much more versitility with the programming as a whole.
Download both demo's and decide for yourself which is better
Anata aru kowagaru no watashi! 