Yes, it seems an XP-22 and XP-27 will follow and that they are still selling the 10 and 15. Lower noise is always a good thing and this is what the Pass info promises. Better or different is an interesting question. The XP20 and 30 are different IMO. I heard and preferred a slightly more neutral tonal balance with the 20 in my system compared to the 30. The 30 sounded richer and fuller, but a bit too much with my XA160.5 amps. I also preferred the XA160.5 amps in my system to the XA160.8. However, I preferred the .8 during a direct comparison in a friend's system with different speakers, cables and gear.
Though I have not done this direct comparison, I did here both of these combinations in my system a couple of years apart. I suspect these are the combinations that I would prefer in my system: The XP20/XA160.5 or the XP30/XA160.8. The XP20/.8 was too dry and the XP30/.5 was too ripe.
These new preamps and phono stages must be the trickle down from the XS Pre and Phono. I'll be curious about the pricing and whether or not it makes sense for existing owners of the 20/25 to upgrade.