BA II Plus vs. BA II Professional

[Deltad]

I've done a search here and heard that the Plus is better than the Professional, but never read any reasons. Can anyone who have already taken the test give me some reasons?
Some problems I noticed from the Prof. is the keys are sticky/slow-response and no hard case; the slow-response problems I can live with since the Ti-30x is the same way.
I don't know much about the Plus.
Any comments appreciated.

[hussain raza]

I've done a search here and heard that the Plus is better than the Professional, but never read any reasons. Can anyone who have already taken the test give me some reasons?
Some problems I noticed from the Prof. is the keys are sticky/slow-response and no hard case; the slow-response problems I can live with since the Ti-30x is the same way.
I don't know much about the Plus.
Any comments appreciated.

Keys of Professional are a bit harder. This is why I don't use professional. If u don't have any problem with the hardness of keys, u can definitely use it.

[SombreSeraph]

The BA II Plus keys are color coded while the professional keys are all similar in style. This was the main reason I chose it over the Professional.

[Forerunner]

Anyone know the average life time of the BAII plus battery? 1 year? 3 years? 10 years? forever?