In case you're not entirely up to speed, the longer of the two telephotos on the 15 Ultra gets one of those 1/1.4" 200MP sensors we've been loving on other models, coupled here with a 100mm-equivalent lens (4.3x zoom). It's not the same package that the vivos have (X100 Ultra and X200 Pro), and it's also different from the Honor Magic7 Pro's zoom camera, so ...
A proper upgrade can be seen on the ultrawide camera. It's another unit of the same sensor that is used here as well, replacing the 1/2.0" imager in the old model's setup. The 200MP 1/1.4" sensor on the 85mm telephoto didn't really call for an upgrade so it's been kept the same. It's really more like three 'main' cameras on the back of this Ultra, joined by ...