I don’t think the differences are that tremendous as far as liturgy and doctrine.
Here in American, a Rusyn Eastern Catholic priest Toth, led thousands of Eastern Catholics into the Russian Orthodox Church. Couldn’t have done that, if there was huge differences, it was a question of authority and not dogma.
I think the main practical differences between the EO and EC in America are that the Eastern Catholics have adopted some of their piety from the Latin Rite Catholics they have been living near for a 100 years. Eastern Catholics attending Latin school K-12 and university, marrying into Latin families, living far away from EC churches and attending Latin rite churches, etc. There was a statue of Mary in front of an Eastern Catholic church in the South Side when I lived over there.