Next, I have appreciated the letter grade rating that UBS provides in the past. But how valuable is that really? For example, while NA27 may not assign a letter grading to the reading or variant they have chosen, if they've gone with that reading, they must still have deemed it to be the "best of all the rest," per se. So what practical difference would it make if the grade were "B," "C," or anything else? They (UBS) still made the editorial decision to go with that particular reading. I don't know if I'm explaining myself well, but I hope you get my drift.
And, lastly, it seems like electronic versions of the critical apparati only include the apparatus of NA27 and NOT UBS4. Am I correct on this? Do you know if both apparati, NA27 and UBS4, are available electronically? Sorry for all the questions, but I so appreciate your time and patience and would be very grateful for your response.
Incidentally, one thing I would say that favors the NA27 edition is the fabulous cross references provided in the side margins. They are particularly adept at picking up OT quotes and allusions in the NT. This, IMHO, is a fantastic strength.