Oh yes he is the same one in John 1:20 just without Blood. this is the ECHAD plain as DAY before your eyes. understand, the Lamb "of" God is Jesus the Ordinal Last in Flesh and Blood. in Revelation 5, this is the Lord Jesus the Ordinal First in Amalgamation in the GLORIFIED BODY..... (without Blood).
this is the same "one" person, only in the ECHAD of Ordinal designations of FIRST and LAST. Now Listen carefully, he who sits on the throne is he who stands before the throne...... (smile)...... Oh dear,

Yikes !
now listen, ... and LEARN, Zechariah 12:10 "And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications:
and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn."
WHO IS THE "
ME" HERE IN THE VERSE? answer, The Ordinal FIRST, WHO is the Lord Jesus, the LAMB, God himself, in flesh to Come the Ordinal Last the Lamb of, of, of, God. Oh my God, this is Just too easy not to understand.
101G.