I don't consider anything leading to victory as ''advanced'', maybe ''superiority'' would be a more fitting term for that, which is a general word and can refer to many things.
Since my first comment i was referring to weapons and armours of the Magyars.
About USSR, i don't know much about the modern warfare, but as far as i know their weapons were not much primitive compared to others, even during early stages of WWII they had more advanced tanks than Nazis.
Maybe comparison of Romans and Huns would be a more appropriate example. Romans had doubtlessly a better organization, better armour, Roman army was richer, they had really good commanders, but still thy lost many battles against Attila and finally could beat them with support from Germanic tribes. Would you know call Huns more advanced than Romans?!
On the last point, of course i don't know as much as historians do
, but by the look of it, Magyars finally settled down in Europe, so no arguments about that