Scripture-first response
“Another Comforter means another divine person.”
Jesus says the Comforter already dwells with the disciples and will be in them, then says, ‘I will come to you.’
What the objection is claiming
‘Another’ is made to mean another divine being rather than another mode of Christ’s presence and work.
John 14:16-18
16 And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever; 17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you. 18 I will not leave you comfortless: I will come to you.Open full referenceJesus promises another Comforter who already dwells with the disciples and will be in them, then says He will come to them.
How the passages answer it
The Spirit continues Jesus’ presence in a new inward way after His physical departure. Paul can call the indwelling presence both the Spirit of God and the Spirit of Christ. The distinction concerns operation and new-covenant presence within the one God.