<smile> :) </smile>
Most Roman Catholics have no clue what that Anglo-Catholic ethos is. But then a little leaven leaventh the whole lump.
Probably a good thing as Anglicans have a tendency to publish introspective “who we are” treatises more than the rest of Christian denominations combined!
The simple answer (with many holes) is an Eastern theology with a Western liturgy.
The Oxford Movement in general and a comparison of John Keble, Edward Pusey and Cardinal John Henry Newman in particular will give you a wealth of understanding of the Anglo-Catholic ethos and why so many RC Seminaries have a “Newman House”.:)