Proac Response D1 vs. Proac Tablette 50 Signature

I asked Proac, the manufacturer themselves, that the D1's tweeter and the Proac Tablette 50 Signature's tweeters are not of the same manufacture.

I own the 50 Tablette Signature and would like to upgrade to the D1.

As another interesting question that will not digress too far from the original question:

Is the Proac Tablette 25th Anniversary an improvement from the Proac Tablette 50 Signature?

I finally heard the D1 in comparison with my own Tablette 50 Signature, both are very good imaging speakers. I use a Cary CAD50 Mark II monoblocks on the 50s and I heard the D1 with an Ayre solid-state amp, although just for a short time.

And I am still thinking if I will improve the sound by moving up to the D1.