Isaiah 50 is one of the “servant prophecies” that refers to Jesus. It describes Jesus’ constant communication with God, submission to those that tortured him, trust in God, and reliance on God’s protection. It provides an insight into the difficulty of Jesus’ life, as he endured so that we could have hope of salvation.
By contrast, Revelation 11 gives us a glimpse of the future kingdom, “The kingdom of the world has become the kingdom of our Lord and of his Christ, and he shall reign forever and ever”. This is part of our hope, our motivation, for taking up our cross and following Jesus, looking for that city whose builder and maker is God.