For as long as I've owned Logos I have essentially never been able to use Text Comparison. I enter the Bibles I want to compare (that's from a dropdown, btw, so I've not misspelled or anything):

I hit enter:

It changes to something completely different. And, yes, most often it changes to all Bibles. You can imagine how long it takes and what it looks like displaying all Bibles with one letter on each line...
Some time ago I spent essentially a full day creating less than 10 TC tabs set up with different Bibles, so that I could save them in two layouts (OT and NT) and would actually have a way to get them to show up correctly, at least when I needed them enough to be willing to switch layouts for it.
The only way I could do that was by trying again and again and again. Once every 50 times or so it either showed up correctly, or it accidentally showed another collection I also planned to make, and then I quickly made sure to save the layout, before opening a new TC tab and starting all over again. But. like I said, it took me almost a full day!
Now I've found that one of my so painfully created TC tabs has corrupted, and so far I've been unable to recreate it. I am really really sick of this!
I've also tried to create shortcuts that will open the correct TC setup to the verse currently displayed, and not to what I was looking at the last time I opened it, but that doesn't seem to work either.
(And -- I've said this before -- could you please implement cmd-. to stop what ever process is going on, so that I at least don't have to wait for a TC panel with all Bibles to populate (and eat up all my RAM) every time things like this happen.)