Here's some info on the MiG-15 vs. F-86 during the Korean War.
ACIG which has always been a pretty reliable data base has made it's living on attempting to put together accurate information regarding air-to-air victories in the post WW2 years. Here's some numbers I got from Soviet pilots vs. USAF, Chinese vs. USAF and in the end the total USAF MiG-15 kill Talley (if you follow ACIG's numbers)
http://www.acig.org/artman/publish/index.shtml
From Nov 1, 1950 through August 29, 1951 the Soviet pilots operating over North Korea claimed 141 US aircraft destroyed of which 44 were F-86s. The USAF claimed 112 of which 44 were MiG-15s! How many of these were flown by Soviet pilots, we will never know. From Sept 1, 1951 through December 31, 1951 the Soviets claimed another 59 F-86s while the USAF claimed another 134 Mig-15s, this is also a period where the F-86E was coming on scene. After that that record of Soviet pilots fall off, probably because most of the Soviets were rotated home as it seem the war was going to drag on.
From January 1, 1952 through May 31 1952 the USAF claimed another 163 and then from June 1952 through December 1952 another 210. During the same period the Chinese claimed 19 F-86s.
Now in the ACIG lists, there are confirmed kills noted by each side, probables and damaged aircraft are not included. In a total tally of these numbers the US bested the MiG-15 1.6 to 1 (178 to 103) during the period Soviet pilots were operating with the PNKAF. In the latter time (Sept 1, 1951 through December 31, 1951 the USAF had a kill ratio of better than 2 to 1, again we will never know how many of the USAF victories were Soviet. Bottom line, as they were part of an opposing air arm, they, along with their North Korean comrades seemed to be getting their @sses kicked.
From Jan 1952, through May 31, 1952 I show an additional 163 MiG-15s claimed by the USAF. From June 1952 to December 1952 the number rises to 210. During this whole time I show USAF F-86 air-to-air combat losses for the F-86 as 122.
Factor all those together and this is what you have - 122 F-86s lost in air to air fighting with 551 MiG-15s destroyed about a 5 to 1 kill ratio. I believe these numbers are pretty accurate as they seem more in tune with admitted communist losses. It has always been said that the USAF greatly inflated its kill numbers, the Soviets who flew in Korea are no different as for example, they claimed 186 F-80s, while it seems only 60 were lost.
So there you have it, you could believe these numbers for further try to split them but I think it still shows that even in the early days of the Korean War, the MiG-15 and their pilots (be they Soviet, Chinese or North Korean) didn't have a dominant grasp over early F-86s and their pilots...
Bounce this data aginst the data from this site....
http://www.acepilots.com/russian/rus_aces.html