All stage pianos seem to be based upon a keyboard trying to simulate an acoustic grand piano action. An acoustic upright has a very different action from a grand. I was trained on an upright, the school had uprights and even now in my sixties only have played a couple of old, bad treated, cheap grands.
The action on any piano varies wildly with quality of craftmanship, price, age, lack of regulation, bad environments etc. Additonally each players differs, some are highly classical trained some selftaught, some play many hours per day, others weeks between.
In the end it"s up to yourself. I have a Schimmel upright, a Kawai MP11, had a Yamaha CP4 and a friend has a CP5. Fun to play all of them, but all feel different. I think you have to play your alternatives and simply choose the action you find most pleasing unrelated to static touchweight, length of pivot, graded, ungraded. Anyway you will adapt to most actions even the ones considered to be bad.