Some Bohemian and German pieces are similar to the enameled Spanish pieces, but IME the Bohemian pieces have greater attention to detail. Glass from companies, e.g Lobmeyr, Meyers-Neffe, and Moser are near perfect. The enamel, if present, is carefully applied. The glass is also carefully made. One thing I've noted in Gordiola glass is that it appears to be hurried. Often the rims are not polished, such as in their 5-spout vases. Rigaree can be a bit haphazzard. The symmetry may not be perfect. The enamel is playful, instead of careful. Companies such as Lobmeyer and Moser were very careful with their enameling. Gordiola glass reminds me a lot of 19th Century Murano glass in its general sloppiness (for lack of a better word), only the Spanish glass is much heavier.
Spain has given us many of our great artists. Much of their art is carefully thought out, but whimsical. The art probably influenced the thought on glass. I mean, how many countries would consider painting chickens all over their glass and sticking chicken stoppers on top?