What is the difference between the Pro V1 and Pro V1x?

Across the reviewers and r/golf threads we read, the Pro V1 flies lower with a softer feel and lower long-game spin, while the Pro V1x is firmer, launches higher, and spins more. mygolfspy.com lab data pegs the Pro V1x at roughly 96 compression. Most amateurs report they 'notice little' difference, so fitting to launch and trajectory preference matters more than handicap.