I dont know how much you can trust the wiki on the la5fn, but it does state that :
"In comparison with Luftwaffe fighters, the La-5FN was found to have a comparable top speed and acceleration at low altitude. In comparison with the Bf 109 the La-5FN possessed a slightly higher roll rate, however the Bf-109 was slightly faster and had the advantages of a smaller turn radius and higher rate of climb.[2]. In comparison with the Fw 190A-8 the La-5FN had a slightly better climb rate and smaller turn radius, however the Fw-190A-8 was faster at all altitudes and had significantly better dive performance. As a result Lerche's recommendations for Fw190 pilots were to attempt to draw the La-5FN to higher altitudes, to escape attacks in a dive followed by a high-speed shallow climb, and to avoid prolonged turning engagements. Utilizing MW 50 both German fighters had superior performance at all altitudes."
If any of this above is true, either the A8 or the LA5FN is not en par with what I constantly see in AH.
Maybe one day we get the fighter version of the A8 and things change.