Microsoft itself is using Lightspeed to backup their VLDB databases. Hence I won't hesitate to go with Lightspeed.
But if you are looking something more beyond only Backup/Restore and to have SQL TOOLS you can think about Redgate. I guess both will give more or less similar performance.
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"Thare are only 10 types of people in the world:
Those who understand binary, and those who don't."