I’m pretty sure that Libronix 3.0f had a text comparison feature but I never figured out how to use it.  That’s why I appreciate the ease with which I was able to use it in Logos 4.  Just go to tools and select “text comparison.”  It couldn’t be easier.  Tony Hunt left a comment that made me go and check out the difference between the NA27 and the 1881 Scrivener TR in the book of Hebrews.  It turns out to be a 15% difference.  But what I really like is that the differences are all highlighted in blue letters and where a red superscript ^o appears next to the word you can hover the cursor over it and the reading in your selected base version will  pop up.  It’s very useful.

B”H