Differing copies of the 1917 Scofield Reference Bible

In the following 2 copies of the Scofield Reference Bible, footnote number 1 to Romans 3:21 for the word "righteousness" on page 1194 ends with "Phil. 3.9.": https://archive.org/details/scofieldreferenc00unse/page/1194 https://archive.org/details/holybible0000unse_f2h3/page/1194 Both copies are "Scofield Facsimile Series No. 2" as printed in the lower right corner of the title page (link and link ). On the other hand, in the following copy (as well as in a printed copy that I have from Church Bible Publishers), "See Rom. 3.26." has been added: https://archive.org/details/scofieldreferenc0000revc/page/1194 This one is "Scofield Facsimile Series No. 1" (link ) and has one more name listed under "Consulting Editors", namely Rev. William L. Pettingill, D.D. My printed copy from Church Bible Publishers does not have this title page at all. The additional reference "See Rom. 3.26." is also in a copy "Digitized by Google" with "Original from University of Michigan", which I cannot find online anymore, but I have a local copy downloaded some time ago (SHA256SUM d0f48765b9eb8a9e399afe0e46e7282cf8add44efe49d08d912b208b1d69f0a0) and which is "Scofield Facsimile Series No. 2" and with only 7 consulting editors, like the first 2 copies. So the difference in the footnote to Romans 3:21 does not correspond in a systematic manner to the differences on the title page! On the surface, all of those copies are the 1917 edition, judging by the preface dated Jan. 1, 1917. Any ideas why this difference? Are there other known places where the two versions differ? Is there a reason to consider one of them more reliable?