@Kreewrote:
My biggest score gap was 616 Auto8 and 694 Bankcard 9 (TUs). An Autoloan 30d late was erroneously on my account, and it affected auto8 a lot more I guess. I think I've heard of 100 point gaps. Not sure about larger ones, but certainly possible. My largest "clean" gap is about 40 points.
Largest single-bureau gap I've seen is 121, between TU Auto 8 and TU 4 Classic ("mortgage"), shortly after adding a few new accounts, and without any kind of optimization of util. 880 vs 759!
But that's a bit of an extreme case, and it didn't last very long - TU4 recovered the following month.
EQ8:850 TU8:850 EX8:850
EQ9:847 TU9:847 EX9:839
EQ5:797 TU4:807 EX2:813 - 2021-06-06