Why does the Email Notification look different in the dev environment and Production environment?

The email notification looks different in different environments.

On Prod, it looks like below. Here, the comments and attachments section appears separately at the end and there is a section of Approval History:

On Dev1, it looks like below. Here, the comments are shown along with the approval chain. The look is totally different that Prod. Here, there is no separate section for Approval History.

I see the BIP Email Notification profile options are set to 'false' on both the instances. What could be the possible reason of this difference?