Surely the Steinway B is not to 100% perfect:
Depending on his short length (Steinway B 2,11m, many other grand pianos 2,4m - 2,7m instead) the lowest bass notes don't have that bass basement like bigger grand pianos (f.e. the Steinway D with 2,7m). This can be heard and must be said.

Nevertheless this grand piano is my favourite instrument to perfom music from any composer in a way that moves my heart and my soul too.
All other Pianoteq pianos that I've tried until now don't seem to be able for me to reach the extraordinary dynamical and lyrical range of the Steinway B.
Surely many of these instruments sound really well too, but they don't seem to be "the one grand piano" for "any cases" like the Steinway B does for me.

The Bluethner, my favorite from the early ver 5 days, is now the most unlike a piano in the current ver 6, with a rounded, softened, through-a-tube sound, as if it's got way too much 'case noise' and reverberation (even though I have reverb turned off), and then it's covered with a blanket.  The Grotrian is a close second in the unrealistic race, running slightly ahead of the Bluethner because it doesn't sound like it's being heard through a blanket.

The interesting thing about the Bluethner in the early Ver 5 days is that it seemed to be everyone's favorite for using as a base to make FXPs that sounded like Steinways, Steingraebers, Fazollis, Bosendorfers, etc., as if it was the most conformable and moldable.  That characteristic didn't carry into ver 6.

...And that C. Bechstein D.G. is Oh so good!

Steingraeber, Warm and Bright
Bechstein Cinematic
Steinway Intimate
Petrof rec 2

Sometimes using:

YC5 Solo (sounds like a Yamaha upright with lid open, that i have played)
Bluethner Model One AB
U4 Tall (sounds like an upright Hellas B2, finnish piano, Now made in China, Pearl River)

Next buy could be Steinway B

Think to buy:
* Steinway B
* U4

The most I like:
1. Ant. Petrof
2. Steinway B
3. Grotrian

I like too but they need some setting modifications:
4. C.Bechstein
5. Blüthner

Acceptable:
6. Steingraeber

Before that, I want to say that this list is subjective and doesn't mean anything. Your list will differ from mine, you will dislike and like other instruments, and that's okay. I thought that it might be interesting to know which pianos are statistically more liked than others.
You might also like another instrument (harp, harpsichord, electric piano...), and that's okay too, don't forget to put it on your list.

With that out of the way, here is my list in order from most liked to most disliked:

(the ones that I don't own are listed with an *)

1. Ant. Petrof,
2. Steinway B,
3. C.Bechstein,
4. Steingraeber,
5. Kremsegg1 (Erard > Streicher > Besendorfer > Dohnal),
6. Blüthner,*
7. Grotrian,*
8. Grand K2,
9. Steinway D,
10. U4,*
11. YC5.*

I would also like to know which pianos are closer to the real ones.

For me at least, it seems like the Steinway B is close to a real Steinway B. On the other side, I don't feel like the Steinway D is close to a real Steinway D (maybe I am mistaken; I haven't had the chance to listen to one in person). Don't get me wrong though, it is a beautiful instrument.
The Ant. Petrof seems to be the most realistic (not close to the real one, although it might be the case).

The Blüthner is a tough one. I really like that one, especially the bass notes, but I don't like the middle ones. I think the Blüthner needs a refinement like the new instruments. This one is definitely number 1 on my wishlist though.

The YC5 is not my kind, the middle to high notes are strange I would say. This is kind of sad because the bass notes are great too.

Overall, Pianoteq is such a great experience. Every day, Pianoteq impresses me more than before.