This is probably a question for postal stationery specialists, but I have these two envelope cut squares. Based on the Scott catalog and the shape of the "D" in "UNITED", they both appear to be design (U86), which leads me to believe that they should be designated Scott U385a (pink color variety):

However, the highlights show subtle differences, even though there appears to be no catalog listing for any varieties that note the following:
The blue arrows show different shapes in the ribbon ends of the banner "TWO CENTS".
The green square shows a significant difference in how the "ING" in "WASHINGTON" relates to the top line of the "TWO CENTS" banner.
The yellow circles on either side of the images suggest that the banner ends of "UNITED STATES POSTAGE" are different.
The bottom yellow circle on the right cut square suggests that there are no lines in the "TWO CENTS" banner (as it appears on the left image), even though the catalog suggests that the lines should exist.
Possibly the Scott catalog is not detailed enough to highlight these subtle differences, so I was wondering if anyone had a more detailed catalog on this issue that they could identify if these are, in fact, two different varieties or if I just chalk them up to being anomalies in printing.