I had a donut hole with the 50.2. It’s not so much the gaps between the dies that make the hole, it’s the emitter size. You can mostly make it hard to see if you adjust the reflector depth. It’s not too noticable in outdoor use, unless you shine it on a building side.
You can also try and offset the emitter slightly to get the hotspot smoother.
I think the closer dies on the new emitters make the dark center, less dark compared to the older emitters. I have pictures if you want.
I’m assuming the xhp70.2 will be the same as the 50.2. Less noticable donut hole, but still there.
Here is the 50.2 at lower camera ISO levels with 2 different reflector heights.
With your naked eye the dark center is less noticable due to the intense brightness of the hotspot, but once you start moving the beam around you will see it again.
If you don’t care much about high distance/throw numbers, you can adjust your reflector height to give a better compromise between appearance and throw.
I’ve found a donut hole pattern always seems to give the best throw numbers.
This donut hole is only related to the height of the reflector. If its good focussed and centered, there will be no hole.
You will have this hole on single-die emitters too, if the LED sits too deep in the reflector.
So the donut hole is only a slight intensity drop towards the center of the hotspot, and to be expected because the quad die of the XHP50.2 is still not perfectly uniform. But it is nothing compared to the old XHP50 and even acceptable on a white wall.