I asked Dr. Maurice Robinson earlier today...
What would you say the percentage difference is between the Critical Text and the Majority Text/Byzantine Priority?
His answer..."Easy answer: if all differences are included, including spelling issues, the difference is about 6%, with about 94% of the text the same in both. If only translatable differences are considered, the difference would be only about 3%."
A lot can happen in 3% but if you are losing sleep over textual variants I hope this gives you some perspective.
A hearty amen to this. That being said, it is still a valid question to ask (not implying Robert was denying this). Which tradition you favor has everything to do with how you weight the various criteria in textual criticism. For instance, if one ties God's providence to the church in preserving manuscripts, and does not believe that God's providence works outside those boundaries, then the TR/MT will likely be your choice. If you believe God's providence can work in preserving manuscripts outside the church as well as inside, then the CT will probably be your choice. As to individual variants, if you believe that the majority rules, then you will probably hold to the MT. If you believe that geographical distribution and the age of the manuscript is more important, then the CT will probably be your choice. It is extremely difficult to choose among these criteria, and there are strong arguments for both positions. Both positions are (usually) treated with respect on this board.