I have been using Sonnet 4.6 for quite a long pretty much satisfied with it. My job involves preparing business plans and write-ups after doing a proper ground

I have been using Sonnet 4.6 for quite a long pretty much satisfied with it. My job involves preparing business plans and write-ups after doing a proper ground work and preliminary market analysis. I'm not sure how to decide which one is good for my task like Sonnet or Opus. And after I read all the comments about how lame opus latest version has become, I never touched it.