Gday all,
i got this clone (sxk) and a shenray clone..
Both are VERY well made and great attys.

The shenray clones are a bit looser top cap fit due to and ever so lightly larger inner diameter. (or possibly smaller deck diameter)
Although very easy to pull on and off to drip, they also let a little bit more air though when the holes are shut. (or supposed to be).. the Shenray clones also have slightly longer (or less of a taper) coil clamps- better for lager builds.

The SXK clones being a bit tighter with the airflow closed are more suited to those that like a more restricted hit (like myself)
So this (SXK) version has become my favorite.

hope my findings are helpful.