The Pope does indeed say, and speak, and act, that we are the One True Faith. However, he (and we) also say that non-Catholic Christians are loved, do possess truth (if not fullness), are our brothers and sisters, etc.
If you carefully examine the Pope’s speeches you can see indeed that he is quite firm and insistent on the TRUTH of Catholicism while acknowledging and respecting that non-Catholics can possess some of the truth in their faiths and by that are in a partial ‘union’ with the Catholic faith. “Separated brethren” points out the fundamental relationship we share as Christians all, yet acknowledges that our brethren have separated themselves from ‘all’ the truth while retaining degrees of it in their separation.
Now Benedict, God bless him, is a theologian of note AND the Vicar of Christ. It is quite natural that he both expresses himself far ‘better’ than I could, and also that his authority as Pope makes his speeches not only better canvassed than mine but better ‘interpreted’ by those of good will.
Still, though I imperfectly articulate Benedict’s words and teachings through anything from typos to unclear or less-than-stellar articulation on a ‘personal’ level, to the extent that my words are clearly teachings of the Catholic faith, they are in line with what Benedict teaches.
Your perception of Benedict’s words that he does not outright ‘claim’ Catholic supremacy may help you to feel ‘better’ about your own faith (and I am not deriding it or you in any way by stating that, good though it may be, unless it is Catholic it is just not quite complete in and of itself, though you may be a far ‘better’ Christian in your personal actions than I am). . .but it is not truly ‘accurate’ if by it you understand that Benedict finds your Church to be ‘equal’ to the Catholic Church and your faith (not your personal PRACTICE, let me reiterate, that is something else entirely) but your FAITH–be it Episcopal, Lutheran, Methodist, etc. etc. while it contains many essentials of Christian teaching is simply not as complete as the Catholic faith. Though again I hasten to add that you personally, in following your faith, may be a far better Christian in your PRACTICE than I in mine.