These 3 versions are bundled with Droidfish 1.56 which was released on January, 9th.
When i've checked the file sizes, i've found out they are the same as Droidfish development version i've been using temporarily between 1.55 and 1.56. The sizes exactly match but MD5 checksums are different. So, better assume there are the latest available.
They are all 121014 versions of Stockfish and the difference i remember is a smarter management of UCİ commands, dealing with different writings, with or without capitals, or combinations. Also, this compile solves the compatibility issue with Lollipop.
Download 121014 latest for Arm5: HERE
Download 121014 latest for Arm7: HERE
Download 121014 latest for i686: HERE