I can only tell about Vortex. As I've mentioned - craftsmanship is very-very good. Parts fit great, quality of the material is outstanding.

Although I have to mention it - you really need an experience to put it all together. It is not one of those ARTF kits that you could put together in a few hours.

The idea behind their product is to provide you with parts that require technological process that is expensive and not a kitchen-top type.

Basically you're getting high quality parts you can put together in a garage lab or so.

I'd rate them 10 out of 10 as far as quality goes.

Hope that helps.

Regards,

Mark