Who is Samuel?? Am I missing something
Anyway, to answer your question (in what I understood)
The Glory which was now being handled by Raphael (previous Honor which was handled by father Gabriel), Raphael took in disciples that are similar to the previous Disciples (from Honor). And he named all the new disciples after the old disciples like how the young doctor Nathanael was named after the old disciple Nathanael (since they are similar) and Simon (Pietro's friend/brother) and Simon (that huge guy who's now in Pietro's team). And I think that goes the same to Pietro and the new Pietro from Glory.
I think it's cus they're both as strong so they could both be rivals that's why they're both Peter? Idk but I'm assuming that's the reason
Wait I don't get the last panel. What does he mean that they're Pietro also? Is it they are Disciple Pietro in a sense that they are THE Disciple of Samuel???