Well, ultimately Gregorian and Anglican chant are the same thing aren't they? But what developed after the reformation I think is more sophisticated. No matter -- I like Anglican Church Music the best of all, and the best of that is the best of Catholic music.
Since I've been Catholic I've been becoming more interested in what the English Roman Catholics do, with the Anglican musical tradition, but the Roman Catholic ethos.
When I was Anglican I couldn't care less what was happening in Westminster Cathedral, I only wanted to hear music out of Cambridge and Oxford.
What's usually known as "Anglican chant" is four or six-part, so not really like Gregorian except in the breathing and intonation of the words.
Here is a sample -- just as a gag, a group called the Master Singers cut a 45 with Parlophone (the Beatles' old label) back in the 60s. They sang, in four and six part Anglican chant, the portion of the British Highway Code pertaining to pedestrians . . .
Here it be, (at least part of it.) I actually have a copy!