Micromark is strictly a distributor; to my knowledge it doesn't make any of its own tools. (It does have a label, Microlux, that seems to be exclusive, but it looks to me like Microlux tools are generally re-marked products of other manufacturers, such as Proxxon. I may be mistaken about that.
Model Expo does make some merchandise of its own: the Model Shipways and Model Airways kits. But virtually all the tools in the Model Expo catalog are made by other companies (Xacto, Xuron, Proxxon, Mantua, Weller, etc.). The only exceptions I know of are a few specialized ship model gadgets - a jig for seizing deadeyes and a "rope-making machine."
I've ordered quite a few tools from both companies over the years, and have generally been pretty satisfied. I don't think either of them knowingly distributes junk. But when it comes to tools they're distributors - not manufacturers.
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