I like to "work" on aging the middle four octaves of the piano keyboard on a note-by-note basis within Pianoteq 6 PRO.
If you will indulge me in telling you what I do with the PRO version, I would be more than happy to share my own experiences with you: Since you stated you don't tinker with the sound other than adjusting velocity sensitivity, the Stage version should be all you need. The Stage version completely capable of providing you with many years worth of music making! If your intent is selecting from a list of default presets, then Pianoteq 6 Stage is fine for you. So "Stage" would be fine and stick with it until you find it's a problem. These, in my experience, should be regarded as a huge bonus and you may find, as I did, that the historic pianos change your view of playing old classical pieces with a piano that is more representative of the one's available to the composer when they were alive.
Also remember to at least try the free historic instruments in the user area (the KiViR and Bells pack). In version six the pianos all sounds great and you won't be missing anything. If your main goal is learning piano then adjustments are, honestly, a distraction at this point. It allows very detailed note-by-note adjustment and it's really for people who have a highly developed ear and a demand for very, very precise sound - it's not called "Pro" for nothing.
The biggest advantage with Standard is, IMO, the ability to move microphones around (you'd be amazed how big an impact this has), but the presets are quite well designed so this probably isn't an issue for you. With stage you cannot use FXPs properly, so you are effectively limited to just the presets your instrument comes with.
You can upgrade at anytime to Standard or Pro without it costing more (and if, like me, you did that when Modartt has a special sale on you might even be lucky and save money ! - Thanks Modartt ). You're loosing nothing in that regard by getting Stage. Having gone the upgrade route myself (started with Stage and went to Standard later) I can say that the presets in Stage are exactly the same in Standard. You still have quite a bit you can adjust in Stage anyway. Up to 48 kHz in PIANOTEQ Stage and Standard.If you are happy with the presets in PIanoteq Stage then you do not need Standard or Pro. PIANOTEQ PRO offers an internal sample rate of up to 192 kHz. In PIANOTEQ Standard, you can explore this feature with the volumeĀ and the detuneparameter. PIANOTEQ PRO lets you edit 30 parameters for each note on your keyboard.
Presets built with PIANOTEQ PRO can be loaded in PIANOTEQ Standard without limitation. In PIANOTEQ Stage, preset loading is limited to parameters that are present in the interface.
In addition to the Standard version, it gives you all the tools needed to work in a truly professional environment, letting you adjust 30 parameters for each note on the keyboard and work with up to 192 Khz audio. Pianoteq 6 PRO is the most advanced version, adapted for the creative composer and demanding studio engineer. You can upgrade to the Standard or PRO version at any time. Pianoteq Stage includes the same instruments, sounds and playability as in Pianoteq Standard and PRO. Pianoteq 6 Stage is the choice of the budget-minded musician who does not need to modify the sound.