The piano I practice on is my Blüthner patent action grand which I got in 2002. I found it at the time in a newspaper advert in either "The Times" or "The Telegraph" which weren't papers that I read but they'd been left on a train that I was taking to London at the time. The piano was in St. Andrews and was being sold by a lady who owned a guest house. She'd bought it 30 years previously from a piano teacher in Broughty Ferry which is just outside Dundee, who had bought it new in 1913. It had largely been unplayed for several reasons: first it was the "good" piano of the piano teacher who also had an upright in her home, and it was virtually unused by students. I think actually she used it for when the board examiner came to her home. The lady in St. Andrews was an amateur cellist and just wanted a nice piano for her music room. She never played the piano although her children had lessons. The hammers were actually in excellent condition and the piano was a real time-traveller. Of course I completely wore out the hammers in about 3 years. The old felt had deteriorated without being played. I had a set of new hammers put on it in either 2006 or 2007 but it wasn't a great job, and honestly I was never happy with it.
Eventually by a twist of fate I was able to have it rebuilt by Piano Restorations Ltd in 2017. It's lucky they did because the piano actually had a small crack in the frame (plate) which I hadn't seen and required attention. They were able to restore the tone of the piano to what it was before I wore the hammers out, but with a far greater dynamic range with greater sensitivity and projection.
The other piano, also a Blüthner, is the 1895 Jubilee rebuilt by Piano Restorations Ltd in 2013. In 2020 for various reasons it was upgraded from a butterfly spring repetition lever to a Tokiwa single spring (still double escapement) with Abel Natural Felt hammers and quite honestly it feels incredible under the hand. Almost too good.... if a fly landed on my hand while playing it, it could interrupt the phrase haha!
The patent action forces me to really focus on finger articulation and sensitivity. I find that it's a great diagnostic piano, and it helps me with accuracy and clarity. I'm not saying that you can't have that on a Steinway or standard action, but this patent action doesn't allow me to get away with anything. It's lighter than the other piano but that isn't making it easier to play. The "point of sound" is higher up, so playing fast repeated notes (which IS possible on this action, in spite of what the internet tells you) involves much more finger articulation than on the other piano but then it makes it so much easier when I play on other instruments. The 1895 piano is all about the tone. It's a very full-bodied, clear, but also mellow tone and the great challenge in playing this piano is listening to the pedal. It's very easy to over-pedal on it and I find myself playing without pedal a lot more on it because the tone is so rich.