Glory is a pretty common word. Two references to glory are not necessarily the same thing. The kingdoms of the world have "glory".
The first thing that needs pointing out is that these are two texts written in two different languages that do not necessarily relate to one another; we cannot simply assume from the word "glory".
The glory in Isaiah is God's glory - that is it is one of his inherit attributes. God does not give this to another, but although the Son is not another, he also does not require this splendour to be given him since He is God.
John 17 itself draws a clear distinction between these two glories, in verse 5 we read that Christ had "glory which [He] had with thee before the world was" in contrast to verses 22 and 24 where it is glory given. John 1:14 also talks of "the glory as of the only begotten of the Father".
Therefore, if the glory given is not the glory inherent than what glory is it?
John 17 takes place at the Lat Supper, Christ is making a prayer, and the scene is set that the subject is the events of Good Friday (John 17:1). And it is in John 17:1 talking about the hour being come that we get our first two mentions of "glorify". The Father will glorify the Son, and the Son will glorify the Father. This echoes John 12:23-25, which makes clear that the time has come for God to receive glory by the death of Christ.
Jesus has glorified the Father (verse 4), and the Father is requested to glorify Jesus (verse 5), but the "elect" also glorify Jesus (verse 10). This helps clarify that this glorification is not necessarily the divine attribute, but it also shows a similarity in how the Father, Jesus and the elect are working.
Glory is a heavy feature in Jesus' Last Supper prayer, John records some form of it some eight times. So, however, is being sent which is there just a bit more at nine times. Jesus is sent by the Father and it is in finishing that work that Father and Son are glorified. However, the disciples have also been sent by Jesus and verse 18 draws the explicit comparison:
John 17: 18 (KJV) 18 As thou hast sent me into the world, even so have I also sent them into the world.
However, there is a subject in John 17 even more common than glory or sending, and that is giving: Jesus has been given people, glory, work, power to give eternal life and the Father's word. The given people have been given glory, been sent, will receive eternal life and been given the father's word.
That the comforter will be sent and given is a major discussion point previously that evening, but what is it that immediately precedes Jesus' prayer?
John 16: 33 (KJV) 33 These things I have spoken unto you, that in me
ye might have peace. In the world ye shall have tribulation: but be of
good cheer; I have overcome the world.
Jesus' warning that the disciples shall suffer tribulation. The glory given to the elect is the glory given to Christ, that is it is the glory to be sent into the world so that God may be glorified.