Since the experiment isolated only one brand of ammo (Wolf Match) shot through two different barrels, it would be prudent to know if the rounds were loaded into match grade chambers or standard .22 LR reamed chambers.
.22 LR is mighty variable between brands; identical makes of the same rifle/barrel, and time of day/phase of the moon.
Many of us long time .22 LR rifle shooters always seek the holy grail of bulls eye accuracy. To discount chamber dimensions even from the same manufacturer is sticking your head in the sand.
They both have match chambers. Only way KIDD makes them.