I've been comparing my recently acquired <Patent Applied For> tapered beam first model (22-18mm taper just like MAX 150G), to various other later models (21.5mm straight beam) in recent weeks, and despite the much thinner top of the hoop, I have not detected any difference in stability or size or location of sweet-spot. I.e. they play essentially the same [astonishingly good].
Having said that, my tapered beam model is 33.75cm balanced, which is unusually head-weighted, especially when you consider there is less graphite there. For its 390g weight, it might be a touch more manoeuvrable because of the thinness than similarly weighted straight-beam models I have around 33cm balance, but my 31.75cm balanced version is much more realistic for a 2hr session. These early models really are the Krug Champagne of rackets, and the tapered-beam model is Clos du Mesnil.