Well, it depends on which country you are from. In Italy it is commonplace to talk about Saracen, Hungarian and Norman invasions basically at the same time in any given schoolbook or general medieval history manual.

But yes, Hungarians are surely the less famous of the three, maybe because they didn't have an impact as lasting as those of, say, the Normans in France, England and Italy or the Saracens in Italy and Spain.

You can add that the muslim world became the perceived enemy of the christian faith for almost ten centuries (some have the same opinion even today?); the normans, on the other hand, shares a germanic culture/language/religion which wasn't completely alien from most other european areas. Then there's the fascination with the whole exploration and discovery thing.

The Hungarian raiders are relatively alien from western culture and the history of their raids is probably more circumscribed both in space and time than those of the Normans and the Saracens and those of the more famous horseriding invaders, the Mongols.

I'd argue that in Hungary, given that they had a romantic period just as well, there is probably a different perception.

[Pedantic note: I used the term "Normans" to refer to the various Scandinavian population, such as Swedes, Danes and Norwegians before AND after the foundation of the duchy of Normandy. I think there's a distinction, in english, between Norsemen being the scandinavians in general and the Normans being the Norsemen that settled the duchy of Normandy, after the Franks granted it to them.]