ProAc Tablette Reference 8 vs Tablette 2000 Signature speakers

I only have the opportunity to listen to the Tablette 50 Signature for a short period in my system and it has been a wonderful experience. Its strength is in detail and imaging. For those who have listened to the following speakers, may I ask what are the distinct differences between them? :-

Tablette 50
Tablette 50 Signature
Tablette Reference 8
Tablette 2000 Signature

Which one will sound the closest to the 50 Signature? Any advice would be appreciated.

Anyone has experience with these two speakers? The Tablette 2000 Signature and Reference 8?

Basically I would like to know which is an overall better speaker with higher levels of refinement and musicality. I would appreciate some feedback. Thanks in advance.