Primaluna amplifier Prologue vs Dialogue Anyone heard both? Worth it?

I have owned the PL1, the PL3&5 combo, as well as the Dialogue 1 and the Dialogue 2. I sold off the Prologues a couple of years ago. The Dialogue 1 and 2 are both much better than the Prologue units. Better bass/lower midrange for one thing. I presently use the Dialogue 2 with Tong Sol 6550's and the Dialogue 1 with SED KT88's. The latter match is my favorite of the two. FWIW.

BTW, price wise, the Dialogue Two s 'are  showing up for 1600 and less. I haven't seen many Ones come up though. 

I have not listened to the 'Premium' units, but from what I hear they will be more linear and modern sounding than the earlier Dialogues. If that is so then they might loose a bit of the warmth of the earlier Dialogues. I would miss that. Another personal reservation I have is that the small tube selection will be limited to 12AU7's  What little changes I have made in my amps have been based on selection of 12AX7's , a type I have used for many years and have knowledge of how they will change the tone. Not so much with the 12AU7's. 

FWIW.