Does A Dimmed Watch Face That's The Same As The Main Watch Face Kill Battery Life?

So, if I want to keep my dimmed watch face the same as the main watch face, will that kill my battery life?

As far as I can tell, the only differences between the main watch face and the dimmed watch face is that the dimmed watch face does have any animations on it.

I’m looking for a way to always have a nice watch face showing without killing my battery.

I’ve been creating my watch faces with a greyscaled watch face for the dimmed watch faces - but, does doing that really help the battery life versus not doing that at all?

I’ve seen this topic, but I’m still not sure: Can there be full watch face in dim mode?