Decide your budget before the first spin
Deciding how much time to give this slot starts with one fact: nobody knows in advance how often the free spins will come. Each spin is random, so one session can bring no free spins at all or several in a row. The result of a single session stays random whatever the RTP, so the RTP describes the long run only.
Checking which RTP version you get starts with the game rules, because they are the only place that shows which version a given entry runs. Both versions sit close together, so the rules matter more than any label on the lobby tile.
Deciding how far to chase a big win starts with the ceiling. The maximum win is 7,500 times the bet, and a round stops when it reaches that cap. Reaching the ceiling is very rare, so plan for ordinary results rather than that one.