I just stumbled on an interesting passage in Baldwin's Moser Artistic Glass (well, two - the other one is in the cut crystal UV thread).
"Webb produced enameled glassware which, in some cases, is virtually indistinguishable in style, decorative motif and technique of excecution, from similar items produced by Moser. Wee emplyed the composite enamel-gilt decorating technique, widely employed by Moser decorators...emphasized naturalistic themes such as flowers, insects and aquatic life forms and employed Bohemian style Baroque scrollwork in their decorative designs. Typically, Webb designs are worked on opaque single layer or cased glass blanks; Moser desgns are more often found on single layer or cased transparent blanks."
I wonder just how typical it is, as generalizations go.
Why didn't they just make some rules and follow them? The English did this, the Bohemians did that, and ne'er the twain shall meet! It would be so much easier.