Well, it's your thread and therefore up to you; it depends which question you are really asking, so perhaps something like...
If limited to the two mentioned:
Slate Digital Fresh Air vs. Fabfilter Pro • Q³
If more general:
Which audio enhancer do you prefer?
If you are asking if they are worthwhile:
Are audio enhancers worthwhile?
By the way, I think the answer to the last one is probably no!
I just don't think Audyssey Dynamic EQ should be put into the same group of tools, and therefore shouldn't be part of the discussion (or title).