I can't speak to the numbers, only the sound. I just moved from the Prologue line to the Dialogue Premium and couldn't be happier. It's pushing some highly modified (2-way made 3-way) ESS AMT 1b's (90dB efficiency) without even breathing hard. The imaging, depth and breadth of soundstage and high/low reach are all light years beyond the Prologue. Paired with the AMT and added midrange driver, the upper range clarity is fantastic, and I've not yet rolled in the Gold Lion gain tubes (but they're ordered). FWIW, I've heard from a few purchasers of the HP, that it loses some warmth. I've noticed more HPs on the preowned market than non-HP, which tells me something anyway. We know what opinions are like, but I, for one, am totally happy with the Dialogue Premium. Good luck!
PrimaLuna DiaLogue Premium HP or PrimaLuna DiaLogue Premium (integrateds)
Getting close to a new or used PL DiaLogue Premium integrated...My budget says the smaller Premium, but I have heard the HP and I loved it! Any ideas about the difference in the two amps. I have a pair of Focal Aria 948s which are fairly efficient, but some say to error on the side ample power with these speakers...Budget 2K-4K