Mig-15's are like the bastard children of a combination of japanese/german aircraft...
Great climb, Great turn, and a blistering set of guns that can kill an enemy fighter with one well aim'd shot, but poor hi-speed performance. (though the mig seems to lean towards killing bombers more than fighters in its implimentation.)
I seem to recall as well that if the mig changed alt rapidly, the cockpit glass would fog up VERY quickly.
Its a question of American refinment vs Russian ruggedness.
Perhaps in a long protracted war the mig's virtues would really shine, but in a limited conflict (and with americas lead in mach1 oriented knowhow, and pilot training) The Russians really had thier foot in the bucket when trying to man thier less-technical, though excellent fighter.
Honestly within written history I cant find a biography where both sides preferd thier own version of a combat aircraft more exclusivly than in korea. Both aircraft have sufficent stength so that one might dominate the other when the THE INDIVIDUAL PILOTS SKILL is taken into account.
Pilot know-how really makes the plane in this case, and thats why I support a Korean arena.