Dont worry about the piezo tweeter: If you dont like its sound, you can turn it useless effectively with a slight adjustment of your VLE filter and you wont notice the difference compared to your Jeff Berlin combo. If I am right here, surely you can't notice the first one or two dots when upping your VLE pot, since you are using a single 15" driver that cant reproduce such high frequencies being dampened with the lowpass filter*. I can clearly notice the effect with my 102P combo, because of the piezo tweeter.
Actually I like the sound of mine. Ok, ok, it isnt a silk dome tweeter, thats for sure, but I have heard MUCH worse piezos before. This one is gentler to my ears compared to most other piezos, in my limited experience. And again, it is easy to tame it with the VLE pot.
*VLE or "Vintage Loudspeaker Emulation" is just marketing blabling for what is actually a simple frequency adjustable low pass filter... Meh! Cant we just call things by their name? Its hard enough already to learn a few technical words about my job without every damn brand calling things their own way! o_O'