CP0018 Cockpit, which Wahoo mount?

Which Wahoo mount including a bell fits the best and is safest on the CP0018 cockpit? I don't want to risk of seeing a flying Wahoo Bolt 🙂

I was checking the CloseTheGap HideMyBell mounts and noticed 2 mounts that might both fit, i only don't understand the difference. Someone knows here:

CloseTheGap HideMyBell raceday4 evo fi (70 euro)
https://www.closethegap.cc/nl/product/raceday4-evo-fi/

Closethegap HideMyBell raceday evo fi (60euro)
*Looks like an older model