Unless one has a true reference level center and placed it correctly (in at least half decent room, with decent MLP positioning), it is likely that some EQ might be required either to gain clarity or to tame the speaker in the areas you care about. Even for reference setup, EQ will be needed if one has specific preferences.
Comparing the default EQ results from various EQ system might as well be the determining moment for most, and then some might venture into some additional curves to tune to their preferences. How this actually turns out to measure in reality will be difficult to tell without checking with REW what the after-correction result is. And even when one does that the question is what do you do with the results if you can't correlate them to your preferences. The last point requires some really geeky involvement and lots of hours of figuring our what you like or don't like within the limits or acceptable (or not so much so) measurements. And that's only the center speaker. Many have more than that

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The point being - most people use completely different process and criteria to compare different speakers and EQ systems in different rooms. So the empirical results are pretty random and recommendations should be taken with a more than few grains of salt.
@peng has done some actual heavy lifting in this area, so kudos to all the great work in that respect

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