Very different from proselytism.
Pope Leo addressed this letter not just to the Catholics of England, but to the English people, and he makes a call for unity clear:
With loving heart, then, we turn to you all in England to whatever community or institution you may belong, desiring to recall you to this holy unity.
Is the above beneath Pope Francis' ecumaniaism?
How can you ignore the fact that the Pope has said, on two separate occasions, that he has no intent to convert anyone?