Inverting string order gives different results

[ekr3peeK]

$stringA = 'Alpin 4 Grnx';
$stringB = 'AGILIS+ GRNX';
$fuzzy = FuzzyWuzzy::getFuzzy();
echo $fuzzy->tokenSortRatio($stringA, $stringB) . "\n"; // 69
echo $fuzzy->tokenSortRatio($stringB, $stringA) . "\n"; // 60

I don't presume this is the intended behaviour, as when testing this with the javascript port of the original python library, the results on tokenSort-ing are the same.