Veto and pocket vetoes both accomplish the same purpose; to block a non-procedural resolution in the United Nations Security Council. How they do this though is where there is a difference. Vetoes are explicit meaning when one of the P5 veto something they are stating and enforcing their veto power. Pocket vetoes however is merely the threat of the use of a veto, this threat can be either in the meetings or outside of the UNSC. The pocket vetoes were responsible for the double veto in the case of Syria.

veto

full of veto

No. The President only has one choice to veto or to pass it. Once he veto's it goes back to congress where they can kill it or they can override his veto with 2-3 majority.