Jesus by and through His physical body is -> our sacrifice, -> our Saviour, -> our Lord, -> our King.
But His HolySpirit is the better comforter because He is in us and not just with us.

Furthermore, when the power is all in the physical body of Jesus, we need Jesus with us physically to be able to accomplish things.

When the HolySpirit power is in us, then we are able to operate without His physical presence.

The disciples needed comforting after Jesus departed and they needed His power in them more than they needed Jesus` physical presence.

The HolySpirit comforter is the SpiritOfChrist Jesus.

Jesus is in the Father and the Father is seen in Jesus. Joh 14:9-11


When Jesus talked about going away He was talking about His death, resurrection and ascension. He had to be faithful in all things in order to enable His HolySpirit to dwell in us.

Note that Jesus sends us His HolySpirit and it was His HolySpirit that sent Him into the world. This speaks to the oneness of the WordAndSpirit - Jesus and His HolySpirit.