I'm coming into this late, largely because I knew it would degenerate into the linguistic brouhaha that it has.
To answer the OP, it really does largely depend on the parish nowadays. On any given Sunday, the OCA parish I attend now (which has Great Russian roots) is not THAT much different than the Ruthenian Catholic parish I attended that is less than ten miles away.
The main differences from my experience that we do at my current OCA parish that we did not do in my old Ruthenian parish include the taking of all the little litanies (wherever they may be) and the use of the curtain/opening and closing of the door. Many of the abbreviations I was used to in my Catholic parish are used in my OCA parish (litany before the Lord's prayer springs to mind). The music is, of course, different, although every now and then I'm treated with a Carpatho-Rusyn melody.
Of course, my OCA parish has Great Vespers every Saturday evening, something that was lacking in my Catholic parish. One thing that is practically the same is the common use of the so-called "Vespergy" @ my current parish for many feast days (but not all) that fall on weekdays. I don't know if this is common throughout the OCA, but it is at St Andrew's in Baltimore.
There are, of course, the linguistic differences that the Deacon Lance and Mickey are talking about. The changes introduced in the RDL did not bother my faith so much as it just bothered my sense of what good English should be, particularly the change to "...who loves us all," which smacks of the terrible and simplistic ICEL English I was subjected to while growing up in the Latin-rite.
I must point out that the RDL was not the reason I ultimately decided to leave the Catholic church and become Orthodox. While I certainly was not a fan of it when my parish started to use it (at the latest acceptable time, I might add), it did not push me out. I can understand why other people might feel that way, but it was not such for me.
I hope I've answered some of your questions. I'm feeling a wee ill and this may not be as coherent as it could.