Rubens Before you get your hopes up, realize that no VST, sampled or modeled, is ever going to sound like your Baldwin - not ever, never. And no VST is going to react as well as your Kawai ES920 does using the internal sounds, because the keys and the sounds are dedicated.
Pianoteq has it's pluses, one being that you can demo it for free. But to me, the sound of all of the Pianoteq pianos I've ever tried is synthetic and uninspiring, audibly unacceptable for my personal taste. Other players think it's great. As for VSTs, before you spend any money on one, download and play every single free piano sample that appeals to you, and there are lots of them.
https://sites.google.com/site/soundfonts4u/ has some smaller sized samples to play around with.
https://www.pianobook.co.uk/instrument/pianos/ has a lot of piano sample sets, some that rival commercially produced ones.
You'll also need some type of "player" to access the samples, like these two, which are also free:
https://www.plogue.com/products/sforzando.html
https://www.decentsamples.com/product/decent-sampler-plugin/
After you spend some time, maybe a week or so, playing, tweaking, comparing however many free vst pianos you can, you just might think twice about shelling out money for something that may, or may not, be better than the free ones, and probably not any better than your Kawai ES920.