I owned a set of acrylic Pork Pie Pig Lite drums that had 14” and 15” floor toms, which I just loved (and wish I still owned, to be honest), as well as a maple Pork Pie kit with 15” and 16” floors. I was able to tune the floor toms in both cases so that there was plenty of tonal spread between the two floors. Think of it like 12” and 13” mounted toms, which is a pretty common configuration. It’s not as if the there’s a huge gap between the pitches, but just enough to make a difference.
Why do I use 15” floor at all? I find that I can get everything I need from them — a deep tone and definite pitch — plus they squeeze into my kit a bit more tightly, which becomes even more important when you get old ... or let’s say older ... like me.
I’m actually not a big fan of 16” floor toms, to be honest. I’ve owned plenty of them and know they’re a standard size, but they all too often sound kind of flabby (or is it flappy?), at least in my opinion. In fact, while corresponding with Pearl product manager Gene Okamoto, he told me that he uses a 15” floor on his “big” kit. And he actually knows a thing or two about drums.
Now go out there and play some drums!