Well, thank you, Al!
To my ears, Slinkys have a "full range" sound. They don't sound scooped in the mids. They have excellent low end, which is big and very defined, and a very clear sounding high end that can cut through, although it isn't harsh sounding. Great, great strings, IMO, especially on EBMM basses.
IMO Boomers have quite a bit less top end. I was recording with a friend who dislikes bright sounding basses, so I guessed Boomers might be a better choice for his project. Their low end sounds slightly fatter, and they have that low mids "bump". Boomers have "Bite", but it's kind of sublime IMO.
All in all, and IMO, Slinkys are "IT" for EBMM basses. I once owned an SR5, and I felt the same way with it. Because of their excellent onboard preamp, you can dial in, or dial out what you want or need. And Slinkys have a really balanced sound across the spectrum, so when my bass' eq is set flat, it sounds that way to my ears. And the onboard eq is very responsive to adjustments. I've never had to "Dime" a band either way, especially when I use Slinkys. Actually, the most useable sound I get from my Sterling is to barely back off the highs, and barely turn up the lows and mids. I pretty much can leave it at those settings and play all night.
Isn't the Sterling a killer bass?!
I've only owned EBMM's single pickup basses, yet they're so versatile with their eq and the 3-way wiring switch, I've never felt I was lacking anything.
That's my two cents, anyway.
All the best to you and yours, Al!