I have not played the 7150's, because I do not like the gauges, so I cannot compare. But no, I would not consider that the BPN's have "sparkle." That said, all strings have "new string zing," artificially bright for the first few rehearsals/gigs until they settle in. The GHS round core Boomers may have a little bit more upper mids, but all Boomers, standard or round core, tend to die due to the different core/wrap ratio that GHS uses on them compared to others. The BPN's do have a lighter gauge verson, 40-101, that might be a little brighter overall, as all light gauge strings are compared to medium gauge of the same make and model. And again, with the nickel being more dense, it may have about the same tension with a flexible feel as a standard hex core 45-105 set of conventional nickel plated steel rounds. You can go to the GHS website and download the tension guide, which I helped Jon Moody put together a few years ago.
Remember that a tension chart is like a naturalist's field guide: it does not say which bird you are going to see where with your binoculars. It only gets you to the right area where you might see what you are looking for. The only way to truly know is, unfortunately, to buy a set for yourself. On the upside, that is what the classified section is for. I have purchased many slightly used sets of all makes, models, and gauges of strings to see what they sound like. Some I have kept to gig with, others, I have flipped over to the next person.