Sorry, Romani, but I have to agree with JFM on this. For some time, the pilots of 56 Sqdn weren't quite sure that it was Voss that they had shot down; read Alex Revell's "Brief Glory" and you'll discover more about this. By the time they had everything sorted out, Voss had already been buried and they had their hands full with fighting the war. As JFM says, they weren't with the Graves registry. If Voss had been taken alive, then they would probably have tried to have him brought to their mess (if possible) for wining and dining, as was so often done on the German side.
I believe you are quite right when you guess that most of the time, any "ace" fallen on the enemy side of the lines was given a quick burial by the nearest or most appropriate ground unit; the proximity to the front line fighting probably determined to a great deal if even this was done. To most front-line ground units (infantry, artillery, etc), a dead hostile airman was of no more consequence than the many other dead enemy bodies they encountered so often. Richthofen and Ball were the great exceptions.
I know that the Germans identified Rene Dorme
's body and it was known that he was someone with a stack of victories - but I've never heard of any great honors given at his burial. Hawker was buried at the spot where he fell, "with the broken DH2 serving as a final monument". Richthofen acquired the fabric from the rudder with the serial number and Hawker's Lewis Gun (and apparently, a monogrammed handkerchief) but I've never heard of any great honors provided there either.
There is a photo in Alex's book "High in the Empty Blue" which is captioned as very probably showing Rhys Davids in the wreckage of his SE. If the Germans knew who he was and knew he was someone of consequence, I know of no evidence that they did anything special for him.
and Walter von Bülow both fell in British lines. It is recorded that the British found a document on Boehme's body which mentioned an award from the Kaiser (alomost certainly the Pour le Merite, which waited in an unopened package back at Jasta Boelcke
's airfield), but again I don't know of any specific honors paid to them.
Perhaps more significant is - how did each side honor their own aces when they fell in their own
lines? We know that for some unknown reason (?), McCudden received a somewhat hurried burial, far less elaborate than the ceremonies provided for Richthofen. The Germans certainly provided extremely elaborate and almost lugubrious funeral ceremonies for their great aces (especially in the early Fokker Eindecker period). Neal O'Connor's and Lance Bronnenkant's books are full of photos depicting these traditional Teutonic events. I suspect the French did their funerals in a somewhat similar manner; Lufbery was certainly honored with a huge ceremony. I've yet to see many (if any) photos of British funerals for their important personalities, so I'd best not comment further.
A similar question would be, how did each side handle the funerals of various important people who weren't aces but who were nonetheless noteworthy? I wonder how the British handled the internment of Prince Friedrich Karl after he died of his wounds in a British hospital on 6 April 1917?? Does anyone know? He was royalty after all, and related to the Kaiser.
When the Germans shot down Quentin Roosevelt, they took a photo of his body in the wreckage of his Nieuport 28 and this was widely circulated (talk about bad form??). If this was an attempt at propaganda I think it backfired against the Germans. They marked his grave with a small and somewhat makeshift cross, IIRC.