Interesting that this thread reared its head at this particular time...
I've been sorting out between the EB Power Slinkies that have been my go-to for years and the D'Addario Pro Steels XL160-5s. I had recently discovered the Pro Steels and I have been through a couple of the Pro Steels and really liked them. Feel a little tauter, even, and bright, but not teeth-knashing bright. Last night, the Pro Steels were feeling dull and I have a few sets of Power Slinkies left from a bulk order, so I put the Power Slinkies on. Now we're not talking any day-and-night differences, but right off, the Power Slinkies didn't quite feel or sound right. They stayed on the bass while I practiced, until finally, I couldn't take it anymore, pulled off the Power Slinkies, and put my last set of Pro Steels on the bass. Now we're talking! So the Pro Steels are my new favorite.
The basses are a Mike Lull M5V Jazz-style 5-strings and a Music Man Stingray SR5. Both basses sound and feel better to me with the Pro Steels. And they are readily available in the gauges I like.