Perhaps someone could enlighten us about the exact differences between the Anglican Use Mass as used in the Roman Rite and the Anglican Mass as used in the Western Rite of Eastern Orthodoxy ("The Divine Liturgy of St. Tikhon"). I know both the Catholic and Orthodox Churches have made some changes to the Mass in order to make it kosher for Catholic and Orthodox use.
The main points are the Eucharistic Prayers (the anaphoras).
The Anglican Use Mass is an Anglican liturgy except for the Eucharistic Prayers (I to IV) which are taken from the present Latin Catholic liturgy. The point is theological: in the Catholic Eucharistic Prayers at the consecration there is the offering of the consecrated gifts to God, while in Anglican prayers there is the offering only of "our sacrifice of praise and thanksgiving" (the point is whether the Eucharist is the true Sacrifice of the Cross made present or simply an offering of our prayers);
The Divine Liturgy of St. Tikhon uses the Anglican Eucharistic Prayers (with the offering only of "our sacrifice of praise and thanksgiving").
Yes, as I said, the Roman Canon in an Elizabethan English version replaces the BCP Eucharistic prayers, and the offertory prayers and the prayer over the gifts from the Roman Sacramentary have been added. These are the main changes to the Anglican Use liturgy. My parish adds the offertory prayers as well, in a style of English in step with the rest of Rite I which is used for 99% of Masses.
Here is the portion of the Eucharistic prayer from Rite I from the 1979 BCP immediately following the institution narratives:
"Wherefore, O Lord and heavenly Father, according to the
institution of thy dearly beloved Son our Savior Jesus Christ,
we, thy humble servants, do celebrate and make here before
thy divine Majesty, with these thy holy gifts, which we now
offer unto thee, the memorial thy Son hath commanded us to
make; having in remembrance his blessed passion and precious
death, his mighty resurrection and glorious ascension;
rendering unto thee most hearty thanks for the innumerable
benefits procured unto us by the same.
And we most humbly beseech thee, O merciful Father, to
hear us; and, of thy almighty goodness, vouchsafe to bless
and sanctify, with thy Word and Holy Spirit, these thy gifts
and creatures of bread and wine; that we, receiving them
according to thy Son our Savior Jesus Christ’s holy institution,
in remembrance of his death and passion, may be partakers
of his most blessed Body and Blood.
And we earnestly desire thy fatherly goodness mercifully to
accept this our sacrifice of praise and thanksgiving; most
humbly beseeching thee to grant that, by the merits and
death of thy Son Jesus Christ, and through faith in his blood,
we, and all thy whole Church, may obtain remission of our
sins, and all other benefits of his passion."