As with Onqelos, variants from Sperber's main text and apparatus are marked #2# and #3# respectively.
In the single case of Targum Jonathan to Zephaniah, however, the main text is rather that re-edited by Josep Ribera Florit in "La version aramaica del Profeta Sofonias," EstBib 40 (1982):127-158 with variants (marked as #2#) from his apparatus.
Targum Neofiti was completely collated against the microfilm of the manuscript, and re-read again for marginalia by M. Abegg and S. Kaufman.