How to improve difference-in-differences graph? I want to visualise what basically is a difference in difference graph but in a better way. My first idea was two split violin plots and it looks good but is too complex for the reader.

Any ideas on what to use or how to make this look decent?
Here the data




Group
Profit Round 2
Profit Round 3




Treatment
198.4205
291.0428


Control
266.7899
311.5257




This is what I finally did, perhaps this helps someone with a similar scenario:

