As a reminder, the first edition of the Blue was published in 1914. The latest stamps I saw were from the 1913 but not even through the end of that year.
First thing you notice is how much thinner the original edition was than today's Volume 1, even allowing for the missing pages in my copy. I can see that this album wouldn't have appeared terribly daunting to a beginning collector, "Hey, this is something I can fill up!"
A surprise was that the maps in the front are the same color maps with Alphonse Mucha styled titles found in the Browns. Another surprise was that many countries did not have spaces for flags, rulers or arms. I say surprise because the title page brags that these are present for all countries, and, in fact, there is a tipped in advertisement selling the labels for a buck.
Those of us with earlier editions of the Blue before 1997 regularly complain about the order the countries appear and it was interesting to note that originally the album was largely in alphabetical order. Unlike the Browns, not completely, because Scott would try to cram two or three countries on a page when there were only a few rows of stamps involved.
The illustrated cuts match up well between the 1914 and the current editions. As a general rule, I would say that there are more spaces with descriptions in the later editions and consequently more blank spaces in the 1914.
As you will see below, there are many cases where there are more stamps in the 1914 edition than on the equivalent pages in the 1943/47 editions, the most comprehensive of the Blue Volume Ones. There are a few exceptions, and these are generally for popular countries, such as Canada, where the later editions added some more expensive stamps that had originally been omitted.
Because of the pages missing from my copy of the 1914, I didn't do a lot of comparisons between the 1943/47 edition (referred to as '43 below) and the 1914, but here are some notes:
--US: my copy of the 1914 is missing most of the US pages but I see that, as in the Brown albums, Scott has placed the US envelopes, Revenues, and Telegraph stamps at the back of the album. These had moved up to the front by the '43/47 edition but the Revenues and Telegraph stamps have now been dropped from the Blue.
--US Confederate States: 8 spaces in the 1914 vs 7 in '43.
--Abyssinia: the 1914 has a row for the 1901-05 stamps missing in the '43 plus 3 additional stamps for 1909.
--Afghanistan: the 1914 allotted half a blank page (unlike the Brown which had a full blank page; early Afghanistan obviously flummoxed both the Blue and Brown editors).
--Albania: missing from the 1914 as its first stamps were't issued until December 1913.
--Angra: 13 spaces in 1914 vs 7 in '43.
--Anjoun: 8 spaces in 1914 vs 3 in '43.
--Annam & Tonkin: in 1914, missing in '43.
--Antigua: 17 spaces in 1914 vs 11 in '43.
--Austria: 41 spaces on the 1914's first page vs 38 in the '43; 1914 includes the Austrian Offices in Liechtenstein missing in the '43.
--Austria Lombardy-Venetia: 11 spaces in 1914 vs 7 in the '43.
--Azores: 1914 has 16 nineteenth century stamps that are missing the the '43. This is one of my pet peeves about the Blue: many inexpensive earlier stamps for Portuguese Colonies are missing from some colonies but not all. Also the '43 is missing Newspaper stamps present in the 1914.
--Baden: 18 spaces in the 1914 vs 7 in the '43. You may remember than in the earlier editions of the Blue, Baden, Bergdorf, Bremen and Brunswick (sounds like a law firm!) were all on the same page. In the 1914 edition, Brunswick had its own page.
--Bolivia: 59 stamps in 1914 vs 48 in '43.
--British Guiana: 35 stamps in 1914 vs 14 in the '43, the biggest percentage loss I saw between the 1914 and the '43.
--Canada: unusually, the 1914 edition only has spaces for 5 of the earliest stamps (i.e., through the Large Queens) compared to 11 in the '43.
--Cape Verde Islands: 58 spaces in 1914 vs. 35 in '43.
--China: the 1914 has a blank page for Issues of the Treaty Ports.
So, bottom line, if the state of coverage found in the first edition could have been maintained, the current Blue Volume 1 would be an improved album.