I agree, K4 should win with equal/same pilot. The TA just has no really massive advantages over the K4 at most alts under stratosphere heights, except firepower and ammunition magazine size. The TA may be easier to roll certain directions at certain speeds, but this is offset IMO by the unstable nose pointing similar to the SPit14 and such that happens with the TA under certain conditions. The 152 may hold some cards at medium altitude, but it's like holding a pair of 5's with a straight flush draw and 2 aces showing as the 5 face up cards on the board.
Certainly a good 152 pilot could beat an average or even good K4 pilot, especially if the K4 pilot makes a mistake or misses his shot after the merge and subsequent maneuvers for first shot. After years of flying the G10 here and then the K4 afterwards, I know which one I would want to be in under 25k.
This thread makes me wish for a Ta152C-3 model, with clipped wings and 2 extra MG151 in the nose cowling. 4 20mm 151's with that potato gun in the hub = P38 like focused firepower, almost, in a very nifty ride. Such an addition as well as perhaps the G.55 Centaur would be great to see here someday.