The prestige of the two coaches will be at stake in this match, Ten Hag and Xavi have both succeeded in making their teams better by achieving positive results in their respective leagues.
Xavi can not compare to Ten Hag who has a longer career than Xavi. Ten Hag not only has a longer career but also more successful one. He succeeded in Netherlands with Ajax Amstersdam in Eredivisie league and in Champions League with a generation of De Ligt, De Jong, Ziyech. Xavi only has one title with Barcelona recent days in Spanish Super Cub. He failed with Barcelona in Champions League this season and comparing their records, Xavi has a less impressive record than Ten Hag.
When comparing the two coaches, the name Erik ten hag is still above Xavi when it comes to his contribution to the club. Erik ten hag was successful with Ajax, that's why the red devils brought him to Old Trafford to train Manchester United now, while Xavi might have helped him with his contribution as a Barcelona legend which allowed him to now train Barcelona's main club. It will take time for Xavi to be compared to a coach as great as Erik ten Hag and I think Xavi can achieve that in a few seasons.