I finally got my Z21 new DCC station (terrific system i must say!!!!)! I tried both the old version of the app as well as the new one.
While some features are better in the new version, i miss having the option to test the function buttons before choosing icons etc... when setting up a new loco.
CV programming seems better (as in easier) in the new app, where it provides a description of what each CV does (old version did not do this if i am not mistaken).
POM does not work for me in any app version (old or new) given the digitrax/Bachmann decoders i have. Programming track works fine though.
I prefer the discrete notches/bars (like speed-steps) on the old-app throttle vs the continuous color throttle when setting up the speed of the loco (i hope i am making sense with this). I think i can adjust speed better when using the old style throttle (or at least it seems easier way to me).
All in all it is a nice progress, as seen from the perspective of someone who has used both apps for the same amount of time. Looking forward to spend more time with the new Z21 and check out more of the features/differences across the two versions of the app.