LOL!!! you may not have used the 262 or the tempest, but you did use the K4, Chog, and F4U4 for the vast majority of your flights! 
I wouldn't consider the Chog or F4u4 as "vast majority". 7 kills in a Chog and 11 in a 4hog... I think just 2 sorties for both. Got top K/D for both! (Tied in the Chog tho). Usually trying to get up fast and quick for bombers trying to take out the boat and need 20mms to bring down quickly or the 4hog speed to get to alt quickly.
The K4, yes now that was the vast majority. But, if youll notice, the K4 is actually pretty tough to get kills in. 3 players made up the bulk of only 867 kills and was the 15th fighter in terms of overall kills. So while its fast and can turn pretty okay, you have to get upclose to make shots and get into fights to push the reversal shot or get a slow passing shot for the kill, on top of the 30s having a mind of their own. So I wouldnt consider a K4 "easy mode", but it does help to be able to outrun a hoard after you rather than the G2 which would get ganged in those situations.