Hello,
the wingload is the relative weight of a plane to the Air, so a plane with less wingload seems to be more light, this is more important as higher the AOA get while a turn, cause as higher the AoA, as less count the airfoil. Some Jets for example fly without a lowspeed airfoil, only with AoA, so only the wingload count while turning (at 1mach + its a different).
We could nearly forget the engine and the aerodynamic related drag if we know that both planes have similar Vmax.
Only if one plane have a terrible aerodynamic and reach the Vmax due to a extreme strong engine we need to take this in account, cause at low speed the aerodynamic dont count that much, so this plane would have a relative good low speed behaviour while turning.
Another important point is the weight/inertia, but La7 and 109G are similar. Much Inertia in combination with a good aerodynamic but less power in relation to the weight, make a good B&Z plane, most US planes was like that, specialy the P51. The P51 have a similar wingload like the Me109G, can turn with it as long as it have E (altitude).
Greetings, Knegel