I think the answer your looking for is pretty straight forward here. I do not own have a US147 but I have seen them in the flesh. I have used the much older iS150, but this was pretty different design from the US147 but had a similar target market, big light wind slalom performance for those that don't want or like freedride boards, yet less physical/technical than formula.
US147 Vs F162. US147 much much easier and far less physical c/w F162. The 162 has sharp rails etc, in contrast the US147 is more like slightly de-tunes iSonic.
The description on the SB site is probably spot on, so go with that info.
I guess that you could drop your 162 and 144 and replace them with the US147. You'll loose maybe 3 knots or so on the bottom end, and maybe a bit of control as the wind picks up. But I reckon that a US147 to F122 should be good
Just my 2 cents worth