840 Printhead in an 8200 printer?

[ibuddy2u]

I recently substituted on a temporary basis an Phaser 840 working print head into a Phaser 8200. It works fine. The printing quality matches the original 8200 printhead to the plain eye but that's not the question.

Do any of you out there with experience be able to comment whether I should continue to leave the 840 printhead in the 8200 and run or purchase an 8200 replacement.

I'm looking for the downside.

Thanks.