Know what the RTP can and cannot tell you
Deciding how long to play starts with one fact: the bonus round has no fixed schedule. Nothing on the screen shows when it is due, and earlier spins do not make the next one more likely. The result of one session is random whatever the RTP, so a higher RTP does not promise a better session.
Checking which RTP version you are playing starts in the game rules, because that is the only place it is shown. Both versions sit close together, so the gap between them is small. Read the rules before your first bet, and treat the figure as a long-run average only.
Deciding whether the top prize is worth chasing starts with one number: x10,000 of the total bet. That maximum win is a ceiling reached very rarely, so no session should be planned around it at all.