This is an aliexpress Catazer 29/700C road/gravel fork that weights about 1900 grams. In comparison, Rockshox Rudy weights about 1300 grams (travel 30 to 40mm) and Rockshox SID SL Ultimate weight about 1330 grams. (Travel 100mm)
https://www.aliexpress.us/item/3256805054818291.html?spm=a2g0o.cart.0.0.12ca38da1de5lQ&mp=1&gatewayAdapt=glo2usaI rode a friend's gravel bike that has a Rudy on the front. I was not impressed. It soaks up some gravel road vibration, but sucked on rough terrain/ruts/washouts compared to the SID SL Ultimate.
I really like my Seraph gravel bike I built up almost 3 years ago. I have about 7K miles on it and have been happy overall, but this bike beat the heck out of me on descents. Then I had my 29er Waltly TI hardtail frame built, and I road it for a while with a rigid carbon fork. Just having the larger tires helped on the descents, but it was a slower climbing bike. Then I put on a SID SL Ultimate on the TI hardtail and it flies down hills, spooky fast. Recently I build up my Spcycle 29er carbon Hartail, 1X12, with a SID SL Ultimate front fork. Based on its components/wheel build, this bike is lighter and overall faster,
with low rolling resistance tires than my gravel bike.
I've been riding the Spcycle hardtail on many of the trails I used to ride my FS mtn. bike, and heck, it is faster overall than my FS mtn bike on most of the single tracks I ride on, and almost as fast on the asphalt as my gravel bike..
My bikes have BB widths ranging from 68 to 83mm, and heck if my body can tell the different in Q factor. But I am not as good of a data point as I used to be, because my body is getting old and worn out and I can no longer abuse and ride the crap out of my bikes like I used to.