I think what Kosta is saying is that the Apostles James and Peter for instance traveled with the Lord personally for a lot of time, where as many of the 70 apostles simply had a vision of or encountered breifly the risen Christ.
I know what Kosta is saying and worse implying..
My personal experience with (good, my word) Roman Catholics is they trust in and even have faith in the Roman Catholic Church, rather than Christ himself.. Not all of them, be advised, but almost all of them.. Bad(my word) Roman Catholics don't even go that far..
AND when they say "church" they do not mean "A" CHURCH but "THE" Church.. Leaving me out in the cold.. To me transubstantiation is silly and could be heresy.. or worse blasphemy.. I have learned to stick with "silly".. I am not their judge..
The apostles chose Mattias to replace Judas, but God chose Saul/Paul personally, unless parts of Acts is a lie.... His letter to the Ephesians is probably the deepest thoughts ever penned by man, any man, in the annals of mankind's history.. excepting The Revelation of Jesus Christ (Rev ch1;1) scribbled down by John..