Can I use the same letters from my O1 case in my EB1A petition?

Hi!
I prepared 10 letters for my O1 case! I want to reuse them in my EB1A petition but some of them explicitly say O1 category in the letters.
It feels strange to me but I heard some people say I can just reuse.
Any ideas?
Thank you!

to silverpanda728:

You might be able to re-use them, but I'd talk to a lawyer about it first. It doesn't seem like a safe move to just change O1 to EB1A since EB1A standards are really high and you want the letter to be as good as possible