So meanwhile any information about HH diamonds?
Upgrades, breakfast, lounge access, status match?
Since no one answered my questions I'll have no choice but to do it myself.
Anyone who booked rooms prior to the changeover gets EXACTLY the same benefits as they Hilton tier.
Diamond members will get suite upgrades, lounge access, breakfast, early check in, late check out, the lot. This is very generous and clever move by Pan Pacific to win over HH loyalists. They practically give HH diamonds more benefits than their own top tier GHA black members. There are no cap, rate or date restrictions, ALL prior bookings will be honoured.
Regarding status match, they do offer but it's not going to be strait forward match from diamond to black. Instead, they will look into the number of stays of each member done with HSW and a status match will be offered according to the value of each member to the hotel. For example, diamond members who spent only a few nights at HSW last year will most likely receive match to platinum, while diamond members who spent 50 nights or more will most likely receive match to black. Just to be clear, even their top tier doesn't guarantee lounge access nor breakfast unless the room was booked or been upgraded. One exception are a very small number of diamond members who spent over 100 nights at HSW last year and therefore Pan Pacific decided to gift them lounge access at their discretion. Apart from those lucky few (I wasn't even close to that) no one gets access unless they stay in high category room.
In terms of visible changes, there aren't many yet.
Public areas look the same, the restaurant kept the same name, same menu for dinner and similar spread for breakfast. One noticeable enhancement was more options to add when ordering an omelette.
In the lounge there are some enhancements for breakfast, six hot options now and for dinner (canapés) there is hot soup of the day and charcuterie.
My suite looked exactly the same, even the bathrobes still have Hilton tag on them. Pan Pacific use Embrace amenities which look and feel better than Hilton's cheap PTRs. On top of the usual staff, amenities include a comb, bath salt and mouthwash. Not surprising this is the standard for an Asian (Singapore) hotel brand.