Τhe batlle that the cataphracts(Scholarii/Ikanati)retreated before 80 knights was an incidence of the "siege" of Constantinople in 1203!
The retreated because their leader was a coward!!!
If we compare the armor or the weapons both sides had we will see that the "cataphracts" had 3 times more heavy armor,longer lances and a combination of long swords(longer than the western ones/Spathas)and maces!!!
Knights had almost exclusevly heavy/long chain mails,lances and long swords/axes!!!
But a unit without morale retreats with no reason at all!!!
As for the javelings...That depands in what era a unit roster focuses!
Things we should know:
1: All units in medeival Roman Empire(Byzantium)had two parts..
The offencive(Koursores)and the defencive(defensores)...
Ussually the offencive part of the unit had steppe(composite)bows but in some cases we have found writen reports for heavy units(mostly of 9th century)that used light javelings(the same time the infantry used heavy javelings (menaulion/martiubarbulus)...
The defencive(counter attack) part was the one that used lances...
All of the "cataphract"style warriors had a lot of weapons to use...
We read in "Taktika" of Emperor Leon VI The wise...
"And you must equipe your heavy cavalrymen with ravdia or corines that are made from wood and metal (ravdion/corine means club/mace),spathia and tzikourion (roman axe,modification of the old frankish axe the franjeska)..."
We can see in the text that a cavalry man had 3 close combat weapons!!!
If you need more info please visit our historical info thread in CBUR...
Relative historical info (it's about to update soon)
Guide of tactics of medeival Roman Armies.