Aden 5¢ Minaret Issue - Scott Vs Sg

I noticed that Scott and SG both list 3 issues for the 5¢ Minaret but Scott lists 2 per 12x13½ varieties and 1 perf 12 variety and SG lists 2 perf 12 and 1 perf 12x13½.

Now, adding in Steiner pages, they tend to follow the SG listing since they identify one as "yellow green". Scott has green or bluish but you can use the 3 spaces provided either way.

I was more curious on why the difference. I tend to think SG would likely be more precise. I have no issues modifying the page to add another variety.

Al,
Steiner has no leading page for Aden (Authorship) the information may have been made by an Aden specialist, and how he/she had their collection.

It intrigues me how Mr. Steiner came by the vast amount of stamp sizes, for some of the most complex examples, eg: modern Mongolia, Ajman etc.
to be able to build Album page spaces.
Whatever, he made an applaudable record.

Wanted to post this as a question under a new topic, but found my answer here. It appears there is an error in Scott (surprise surprise). SG is correct in this listing.

On the scan below First two rows are green perforated 12x13.5. Third row are green perforated 12x12. The last row are yellow green perforated 12x12. One thing I don't know if there is a premium for any. Scott list premium (slight) for green 12x12, but it could be for yellow green 12x12 given the error.

Old thread or not, your post greatly improved it.