Was This Carmine Lake Washington 2 Cent A Scott #634e ?

Based on your scans it appears to be the lower left stamp from a Scott 634d (booklet pane of 6) and used long after normal period of use.

In my opinion the perforations & width of the both left bottom sides were more the same as #634e than #634d, especially the carmine lake colour

Given that Mr. Crowe expertizes US stamps for a living I would go with his opinion. Just saying.

The only possible carmine lake color I see in this thread is on the fish hatchery shack roof! By the way, I believe the perforations and design widths of 634d and 634e would be the same, not different. And the opinion that I trust here is Mr. Crowe's.

I think you just got a free expertization, and should spend the saved funds on a non-special dinner with the significant other.

Part of my Genetics report results were bizarre. My calculations were perfect. My data were random. I had a red-shade of eye fruit fly mutation. I flunked the Ichihara Test they gave me so I passed the lab.

Carmine vs Carmine Lake looks the same to me. Is there any other way to distinguish between 634d and 634e? Any opinion as to which one this is?

Good point about everyone's color perception being different. And along the same lines, everyone's monitor displays colors differently and every image is generated a bit differently.

This means that at best you can get opinions on this image and how it appears on their monitors, not on the stamp itself. IDing stamps by color via digital imaging is dicey. It can help if you scan several copies of 634s together so at least folks could weigh in on the relative deltas.
Don

"It can help if you scan several copies of 634s [or whatever subject stamp is] together so at least folks could weigh in on the relative deltas."

Cannot be said too often !! "Single stamp images when asking about color, should be banned!"