"Help" From Partners

[nine01c]

Just wondering what different philosophies there are to handling "help" from your partner. I mean unsolicited help.

Situation 1)
You are LEAD and there is a tip OOB among a cluster of players. Ball tips off red under the backboard, You call "BLUE!" and point. Then you hear TWEET! and your partner out at the arc is yelling, "No, RED! Blue tipped it out." You are Sure you saw it right (or maybe you made an educated guess), besides it is in YOUR area. Do you switch to his call, or keep you own?

Situation 2)
Similar play, but you are the TRAIL. LEAD has a tip OOB play on the endline. He calls BLUE! You say to yourself. "Hmmm, sure looked like Blue tipped it out to me."
Do you keep your opinion to yourself and just move on, or do you TWEET and offer your version of what you saw?

Would you handle these situations differently if they happened only once in a game as opposed to several times?
Let's assume these things happen despite a thorough pre-game that addressed coverages and helping, etc...Thanks.