I'm comparing the website and reservation forms, and while I'm pretty sure these will be straightened out before the reservation deadline closes, I noticed that:
--the photo of the Phase 6 Viewliner appears to show Phase 4, with the large Helvetica Amtrak 'wordmark' (as described in the paint scheme + logo guide).
--the reservation page mentions Phase 3 without saying whether this is the older Phase 3 or the newer Phase 3+"Amtrak America" variant. For the record, I'm assuming this means the latter as the VL-2's are all in the latter scheme.
--the reservation page refers to Phase 6 as the "Amtrak America" scheme. As far as I know, and according the the logo guide, "Amtrak America" appears as a variant of Phase 3. Phase 6 is essentially Phase 4 with the current-day 'Travelmark' logo replacing the large wordmark.
Personally, I'm looking forward to reserving a baggage and crew-dorm in Phase 3, two Phase 6 sleepers and one diner. Going to be my most costly passenger car purchase since the Acela
---PCJ