I ordered the Mosmatic wand and gun just to see....
I still prefer my 12+ years old MTM gun. Without doing a full deep dive, the MTM is more linear vs the Mosmatic is more -press down to engage, and the trigger pull spring is more direct on/off- relative.
The wand. Did not see any COO offerings. The plastic on the handle part arrived with a slight chip in in.
The Mosmatic order is being returned but I don't see what the rage on Mosmatic is all about.
It depends on what it is. I've ran Mosmatic and MTM items back to back, the differences between are somewhat subjective.
The SGS28 and OG Mosmatic look relatively similar, the differences between both are minor. As mentioned, the MTM has a progressive trigger action, the Mosmatic is basically an on-off switch. That aspect caught me out to begin with, but prefer the more positive feel of the Mosmatic now. I also like the neater integration of the swivel into the body of the sprayer.
For wands, I think this is a more definitive verdict. I never liked the MTM version, it being unbalanced and less comfortable to hold than the Mosmatic. The stupid rubber boot on the MTM is basically useless as the nozzle protrudes beyond it. The Mosmatic has none, the nozzle itself provides that rubber protector.
Fittings and connections, previously I would have said the Mosmatic items have a nicer "snick" to them. However, the new US-made Prima fittings from MTM have bridged the gap, looking and feeling much nicer than the Chinese-made versions.
I guess it comes down to budget and personal preferences. Nothing wrong with either brand, both produce similar products, both are fantastic upgrades over an OE setup.