The version tags are slightly different.

1.0a and 1.0b are different, they have different datasets. This is not an update to 1.0a, rather it is an attempt at a slightly different approach.

Regarding 1.0b:
Don't use many tags at once.
Raise the weights of tags, some start to reveal from 1.3 and up.
If you use a known character (say, Genshin Impact characters) lower their weights. yae_miko:1 may not show changes, while yae_miko:0.5 will.