They didn't switch of the order of Comet Lake H and U releases. So I was off there.
They tossed them into the 10th. But to came up with a labeling system that is perhaps inspired by a drunken sailor in a strip club .. they have added an extra level of to complexity the product level decoder ring.
https://www.anandtech.com/show/1478...met-lakey-10th-gen-core-for-low-power-laptops
The newer 10nm implementation has 4 digits and ends with a Graphic level code . The tweaked 14nm with new memory controller has 5 digits and ends in U/Y and no graphics digit code. (more digits for the older product foundation. I suspect the more digits is coupled to the "more cores" a.k.a. bigger boobs. ) The fig leaf merging these into the same generation is that the memory type coverage is the same ( but not the speeds of memory ).
It is probably a really lucky thing for Intel that AMD is not trying to compete this year in this segment. They are shooting at different very narrow segments inside this segment with highly overlapping products.
If Intel slapped a new Memory controller on Comet Lake U then it seems likely they'd do the same for Comet Lake H .... unless following the Y track and just recycling the die with some small die tweaks and a new PCH coupling. It may just be consistent with the haphazardness of the gen assignments to put Comet Lake H into the 9th if it doesn't have the memory controller upgrade ( since perhaps that is the 'rational' factor covering the 10th designation. and just irrationally stuff Y into 10th because not looking for clarity. ). However, the H needs LDDR4 as much as the U does. It would be odd to confine all that backporting work to just one relatively narrow product. But its an odd situation that Intel is in.
The Tweakers leaked roadmaps do make mention of LDDR4 for U and not H. So maybe that is how H lands into the 9th. But for H to miss going into the 10th at this point it has to be missing something that the 10th are getting (or were suppose to get). But if H class is coming forward for an early MacBook 16" then 10nm is probably doing better than the original plan. ( These Comet Lake U are gap filling but the gaps are incrementally smaller than projected. )
Apple dropping the MacBook is suggestive of why Intel also didn't throw tons of memory augment work at the Y class.
( and perhaps why Apple upgraded the MacBook Air retina and still sitting on 'old' Y's to perhaps soak up the rest of the supply they contracted for and much better "off to college" timing. ). Also throw on top Intel putting lots of effort into Lakefield
https://www.anandtech.com/show/14773/hot-chips-31-live-blogs-intel-lakefield-and-foveros ( if that is coming Q4 19 for some non Apple player(s) who is going to buy big then I could see them killing of a backport to Y for memory updates ). The Y won't do as well fending off Qualcomm (and ARM) on the lower end that Lakefield probably will.
P.S. The 1.1GHz base clock on the 6C Comet Lake U doesn't particularly bode well for the 10 core Comet Lake H. The incrementally higher core count is going to come at a significant loss in base clock. Apple could be skipping the 10C model if the trade-off and TDP (of let it off the chain a bit) don't match up with their new case and expectations.