I'd say that boss is cooler than whats in the majority of Japanese platformers, especially in the last 15 years.
And Neogeodev team advertising this as a 'eurostyle platformer' is completely idiotic. Apart from the fact that such a title sounds stupid, Turrican was a complete attempt to be as japanese in its design as possible. If anything, a 'eurostyle' platformer would be more along the lines of stuff like Myth and Lionheart, where character animation was emphasized over tight controls, in a prince of persia kinda way (and of course having to hold down buttons then press different directions to attack)
I was making fun of the word, of course. If we're talking about visuals, I think it's silly stating there ever was a style proper of the European countries as the term implies (something which you only could expect from Americans, by the way; how come there isn't an Ameristyle?) but it's sure nevertheless the style of Turrican and friends is different to the Japanese one(s), since you can clearly say that those couldn't have been made in Japan. And yeah, even if it tried to be as Japanese as possible (mostly mechanics-wise, though), which it indeed did.
The major thing which separates Japanese and non-Japanese visuals in bitmap games is polishment and coherence in the end, if you ask me. Japanese were (are) better and more educated artists and also put more effort, hence you don't find mistaken proportions and colors, dumb motifs and lazy decisions in Japanese pieces like you do in Western games. That's why you won't find anybody saying that Nieborg efforts are 'eurostyle', and only some little things (usually the worst ones) unveil them as non-Japanese visuals.
...while, as I said, somewhat impressive and not entirely bad (I agree it's by far the best they've shown), lacks the beauty and refinement of samples like these:
They all less than ten-years-old.