The part of a session nobody can plan
Deciding how long to stay in the game does not change how often the bonus round comes, because that frequency is not known in advance. The result of one session is random whatever the RTP, so a higher version does not promise a better evening. Treat every session as an open outcome and set your own limit before the first spin.
Choosing a version begins with the game rules, because the RTP running at Richard Casino is shown only there. Open the rules before your first wager and read the version listed for Clover Bonanza. Once you have that figure, you know which version you are playing.
Banking on the top prize means planning around a ceiling that is reached very rarely. The maximum win of Clover Bonanza is set by the game and is not a target for any session. Keep your budget sized for ordinary results, and treat the top figure in the table as a limit, not an expectation.