Implicit comparisons, ''better than '' imply comparison between
at least two objects. In logical sense this comparison is the same
as ''longer than'' between people because it imply an ordering or
sequence like a>b>c, etc. In Greece for example people are
ordered by an assumed ''average length'' of, say , 170 cm. Those
above 170cm are considered to be ''long'' those bellow as ''short''.
I myself am considered to be a long guy in my native Serbia
because I am 184 long. In Holland however I am considered to be
''average'' because ''long'' in Holland means above 190cm.
So in Greece , Serbia and Holland the length is assumed to be
an quality or property of an person and this make no sense.
One can't have different properties depending from countries in
which one is accidental present.
Consider now the question ''which is the best cart ?''
This make as much sense as ''who is the longest guy?''
By this question some ''inherent qualities'' of an single cart are
assumed to be ''the best''. But the answer is only possible by
some comparison. Say: among my 5 carts the ''x'' is the best in
comparison with 4 other carts because...
I try to avoid my (young) brother chakster who would like to
answer the question if MM carts are better than MC kinds or
the other way round (grin). For this kind of comparison we need
quantifier ''all'' (''all MM'' + ''áll MC'') while ''all'' is not a name
which refer to peculiar objects. With ''all' we want to express
generality which contradict any specific comparison.