Thank you all for your comments.

What I am hearing thus far is:

The 4yrd Bx Plt is a lighter garment on the hips.
Also the smaller amount of Tartan round the backside lends itself more easily to hot and humid seasons. (Having read Tartan Hikers study, I also appreciate the versatility)
There is also a factor of it being a fairly old style reborn in our times.

The 8yrd Knf Plt is a heavier garment and with the volume of Tartan round the backside lends itself more easily to a colder season (for some).
Also the swoosh and sway of the voluminous Knf Plt has a unique beauty to to it (perhaps beat out by the 8yrd Military Bx Plt varieties).

I don't suspect one is better than the other, they are simply different variations in my mind.

Has anyone uncovered a retrospective preference for one style under "these" conditions and the other under "those" conditions, other than the above kindly insights from folks?

Thanks again to everybody who has contributed here, they are a good help.

peace,
justin