I can't comment on DW performance specifically, but I played a Keller Maple kit and some Pearl Session Maples for years upon years, so I can comment on the generalities. I got really tired of fighting those drums to get what I was after. I could get the sound I wanted (or close), but that usually required looser head tension, pre muffled heads, and a lot of patience dialing them in.
I was after more punch and focus, and some more natural low end, and kind of stumbled into the Tama BBs. I'm super satisfied. The hardware is a little heavy, and maybe they don't have quite the sustain of the maple shells, but at similar (low) tuning they sound fuller and punchier, and I'm not going for sustain-for-days sounds anyway. And that's with g2s over g1s. I'm partial to the EMAD and GMAD family of bass drum heads, and the Tama inherently gets me closer to a modern kind of processed punchy rock sound than either Maple kick.
The hardware is great. I miss the weight of triple flanged hoops but I like the focus the die casts give and maybe they hold tuning a little better. The starcast mounting system is maybe not the most elegant solution, but I think it functions well in terms of sound and stability. Using mic clips with the starcasts is, unfortunately, tedious at best. I had to buy entirely different mounts, which was actually a more flexible system anyway, so I'm happy... but maybe not the most necessary expense. The starcasts are also a little more struggle to get into bags than the optimounts I had on the maple kits.
The bass drum mount is pretty cool, with the ability to slide and all. I have a Taye slide track on my Keller kit, but I feel Tama's take on that is more sleek and solid.
I currently have two BB kits. No quality issues with either. They both look great (one is a wrap, the other a sparkle lacquer), and I'd be hard pressed to describe a sonic difference between the two at equal sizes and tunings. One is black chrome, the other regular, they've both held up well.
I kept the Keller kit around for the situations where I want something more resonant and traditional sounding, and/or lighter to move. I have yet to use them over the BBs, but outside of jams, I've only been playing rock and metal. When my blues/soul project picks back up, I'll go with the Kellers.