FWIW, PT and RB share the same notation engine. So if you are looking to improve the notation by purchasing RealBand you'll be disappointed.

I have been able to print some pretty usable scores with PT/RB, but it is not the same as Finale. There are quite a few options in the notation area that may need attention for your use, and you can 'draw' volume changes .. using the piano roll window in RB.

However;
Finale is a notation software with extra DAW features, while PT/RB are DAWs with notation (and many other) extra features. There is a difference and your needs should be the deciding factor.
PT/RB notation as not been improved (updated) in many years. It is what it is.

I do not work here, but the benefits are still awesome
Make your sound your own!