In Ottoneu Baseball, when you propose a trade, the prompt box asking you to confirm the trade proposal includes not only a note on your future cap (e.g. “You will have 0 roster spots and $4 available”) but notes the impact to your cap – the delta – “You will have 0 roster spots and $4 (-$2) available.”
This doesn’t show up in Ottoneu Basketball trade prompts! I really like it because it helps me balance my loans