People pay extra for a piano with an extra heavy action, so they can prepare their muscles for performing on a grand piano. I have a chance this holiday season to accompany a choir on a grand, I wonder if I am fit enough? I tried a $7000 Steinway studio piano when I bought my $3300 Sohmer, the Steinway was definitely heavy touch and slightly faster.
I dont understand the fascination with buying plastic toys that will last only a decade or maybe a half more. I picked up my third wood piano for $50 this year, to put in my country trailer (caravan) to play in the summer. A spinet, it would fit in the trunk of a car on its back. No it doesn't sound great - it needs to play with the top open, the wood front is too thick. But the feel is exactly right to keep my muscles in shape. I cost me $90 to rent a truck move the piano the 30 miles out there since I don't have a running car, but nothing like the cost of these toys you are trying out. On top of those the digital toys need a $1000 sound system if you want to hear real piano sounds, and not wear headphones. My sound system is only $1000 since I found the speakers used from a bar band leaving the road, and repaired the amp from a blown up hulk. New the sound system would be $1400.
As far as tuning the piano, I do it myself. Takes a $20 kiddie keyboard from the toy section of the charity resale shop. However, I use a $50 hammond H100 organ for tuning reference.