The IDF already had 105mm armed M-48s in the 1968 with L-7 guns as used on the IDFs Centurion fleet. Yet of course the 105mm armed M-48A5 stop gap did enter service with the USA in the 1970s actually post 1973. So in the 1967 war 90mm armed M-48s did face down T-55s as they did in the 2nd Indochina War.
Of course looking at special models would lead one to conclude the Sherman was better then the T-55 int he 1960s because the French made 105mm L/P gun was fitted to Shermans in Israeli service...
Seems like the M-48 even the M-48A3 was more advanced and more favored by crews and the 90mm was capable to knocking out a T-55 with of course the 100mm being able to kill a M-48. Crew comfort is one of those things rarely thought about but it makes a difference. But those early gasoline powered models had problems from operational range to catching fire.
But versus topics are bad because one can never factor in equal crews, equal suprise, equal readiness and equal support.