As a former Presbyterian, now Catholic (RileyG is Catholic I'm pretty sure), my own experience of the Presbyrerian Church was that it was not as "liturgical" as the Catholic Church.
In this context the word "liturgical" needs to be a bit more clearly defined. Secondly I didn't study much Presbyterian theology or liturgy. I was a regular participant in the services, but picked it up on the run so to speak as I was an adult convert to Christianity (aged 28). Although in fairness I've picked up a lot of Catholic stuff "on the run" as well as I didn't become Catholic till I was in my 40's.
Mind you I learnt a lot from my old Presbyterian pastor and he could preach the pants off most Catholic priests I've heard. He had a gift for public speaking. He's still the most formidable religious figure I've met.
It depends what you mean by "liturgical". Order of service? Definition of sacraments? Statement of faith or creeds? The music? Quality of sermons or homilies? The definition of comunion and the elements?
There was a fixed order of service - opening hymn (preceded by more music in the evening service aimed a bit more at young people), Bible reading, homily, collection and so on. The only prayer I can remember reciting on occasion was the Lord's prayer ("Our Father" to Catholics); there was no statement of faith (Creed), no confession of sins (Confiteor), and we only had communion once every 3 months, although it was a solemn affair.
There were prayers but they weren't the highly organised affair that the Catholics have. There was usually only one Bible readng unlke the three and a half that Catholics have (usually OT, responsive psalm - the half - NT letter and the Gospel). But they knew the Bible better than most Catholics.
There was a liturgy but not as full as that of the Catholic Church.
PS - we had a gym under the church. I didn't have a church tracksuit, but it had the words on the back "... strong in the Lord...". That was actually quite true for some of the young blokes!