Okay, the SXK has arrived! Built my usual 1.8 ohm coil and let it wick for about 8 minutes, and I've been vaping it for 15 minutes or so...
First impression was that the box, the branding, all of it looks identical to the real SvoëMesto model. The box is branded, and the sticker that I had to remove to open the box says "SvoëMesto 100% Genuine Product". I don't see an SXK logo anywhere- not on the box, nor on the tank itself. My suspicion is that SvoëMesto gave SXK license to do this. Even the product manual inside the box is a SvoëMesto manual, complete with branding and a link to the SvoëMesto website. But given that I only paid $18.99 from VapeYaya, I don't see how this could possibly be the real, SvoëMesto version.
The tank is somewhat heavier than the Tobeco, and feels sturdier. Airflow adjustment ring, and even juice flow control, feel a bit smoother to adjust.
As far as vaping it goes, I find the draw to be somewhat tighter- even on the widest airflow option, I think it's still a tad too tight, but I can live with that I suppose. I'm still having to vape my 1.8 ohm coils at about 12-14 watts. For now I've settled on 13.5 watts. No point in using my old mouthpiece, as it would only restrict the airflow even more. However, the SvoëMesto, Tobeco, and SXK Kayfun5 all have this odd mouthpiece which is stainless steel on the lower part, but has a white plastic part with threads, screwed into the top of the stainless portion. This white plastic part is the actual part that contacts the mouth. Personally, I don't like this, and I'd prefer having a solid stainless mouthpiece, so I went ahead and added a Kayfun3 mouthpiece to my order from Origin Vapes when I ordered the O-rings.
Anyways, I do find the vape to be somewhat smoother than the Tobeco. The flavor is also somewhat improved... not profoundly so, but noticeably. Honestly, my only real complaint is that the airflow is a bit too restrictive.
Also, the Tobeco clone produces somewhat larger, thicker clouds. Personally, I can do without those... I like my vape to be sufficient for throat hit and such, but otherwise discreet. I try not to attract too much attention when vaping in public. So I'm happy to have the smaller clouds, given that I find the hit is satisfying. However, to an extent, cloud size and density can be adjusted with the juice flow control ring.
I ordered two sets of the O-rings, so once those arrive, I'll be able to give my final opinion as to which clone I prefer.
Edit: Oh yeah, I almost forgot... on the Tobeco clone, after I refill it and I go to re-attach the top piece, I have to push the top down onto the tank in order for the threads to catch. This isn't the case on the SXK, I just place it gently onto the top of the tank and twist, and the threads catch easily. That's a nice, convenient little improvement!