Tried Chromes (good overall) but not EB Group III so I can’t actually participate to the poll although I’m curious to check the impressions of TBers who have used the EB strings ...
The Group Flats fall in the same spectrum as the Fenders and the Chromes but I'm liking them better than both of those. The Chromes are decent and I liked them a lot more this time around than I had previously. They darkened up a lot upon breaking and seemed to have a more pronounced mid scoop to them... or maybe it's hyped lows and highs creating that perception but they just kinda don't do anything spectacular in a mix for me. I like the Fenders better than the chromes as they have a mid growl to them that's really nice and develop a good amount of thump to them as they break in. There's something about the Group Flats that's kind of hard to pin down. They almost sit between Fenders and Chromes but to me have a better clarity than to them than both sets and not as growly as the Fenders. The top end on them has a sweetness to it without any harshness. Mids are smooth and the low end is plentiful. I know people like to say that these are all three the same strings but having all three sets on hand and comparing them they are actually quite different. I could be happy with any of the sets but my pick for this type of a flat is definitely the EB Groups.