Hmmmmm nice post but if i may question this from your results id say they are too far apart to be even considered accurate!!!
Both kits sit in the engine bay --- Yes
From your results it shows that a standard Oem air box which loops the air within a plastic box then sends it into the engine runs cooler Than a aluminium open cone air filter....
I've had the V2 mate and yeah around town yeah i'd admit it does suffer in warm weather given december wasnt that warm i do oubt you say such high reading!!!
Was the probe fitted lets say 1st thing in the morning before the car was started and allowed to get up to working temps!!!
How did you mount the V2 most kits ive seen are in contact with the inlet manifold which does make a massive difference to how hot that alli tubing gets!!!!
Was the radiator hose insulated from aem v2 tubing???? If memory serves me correct there is a hose sitting on top of the alli tubing!!!
Once you have done the above id be willing to be less sceptical of your results but ive done the above steps and yeah the aem does get warm in town yup it does but no where as warm as it gets with the alli tubing touching the inlet and the radiator hose resting on it!!!!!
