I would give it a couple days to figure itself and run background processing.4:50h SOT with 30% left. + 2:15h screen off usage
you would see 10h SOT with strictly optimized usage - wifi, half or less brightness, browsing. Any deviation would guarantee you 8h comfortable SOT, while heavy usage would be 6h SOT.
Inherently, pro max is levels better in this terms but comes at a cost of dollar amount and bulkiness. But expect +4hrs of additional SOT for max.