Ability to A/B render passes

Ability to A/B render passes and save passes in the VFB to history would be great. I often myself wanting to do this.

Saving to the VFB history saves all the image channels (passes included). If you have two images containing the same passes, you can always compare a specific pass. Is that what you mean or do you have something else in mind?

Unless I’m missing something, the only pass that you can A/B in the VFB is the RGB? The passes may be there, but they cannot be seen in A/B mode.

You can compare any render elements. Where did you get the idea that only the RGB is comparable?

Best regards,
Vlado