Lightweight belay jackets (100g PrimaLoft One)

The Rab Photon is heavier than the Xenon, 100g Primaloft, I think. Nice jacket. I have worn mine on Mt. Whitney in April and Rainier in August.

Has anyone used the new Wild Things Insulight Hoody? Not only can you choose colors, pockets and placement, but you can choose the amount of PrimaLoft filling and whether or not you want PrimaLoft Sport or PrimaLoft One. There's two options of fill weight - 2ounces and 4 ounces. The 4 ounce measures to about 113 grams of PrimaLoft. Just curious if anyone else has noticed this option and if anyone can speak of its use. Thanks!