Yeah the reviews on the Legends are different because they changed them at some point earlier on. Also take the bass their on into account as well.
IME the Legends have the fundamental of a vintage flat (but not quite as punchy due the round core) and the brightness of a more modern flat but not as bright as Chromes. The Fenders have more going on in the mids. Honestly they're not very similar strings. That's why I said the Fenders are like a darker (less bright) version of Chromes because the two have a lot of similarities tone wise, but the Fenders aren't as bright. The Legends, to me, are a like tad brighter vintage flat. So they have a blend of vintage and modern characteristics. Not overly bright, but there's a sparkle there, but turn down your tone knob and they get thumpy, but due to the round core it's a weaker thump than a hex core flat. Hopefully that helps. I feel like some flats have big differences and others are subtle variations. I put Fender 9050s in the group with Chromes, EB Group flats, SITs, etc as all being very similar with some subtle differences. Then you have the group with a Vintage/Modern blend (DR, TIs, and the 9050s have some overlap here) and then the Vintage group (GHS, Labella) and then I put Rotosounds on an island alone because nothing else compares to how they are.