weapon_tech in EDU Simple v Bladed

[hacon]

I have noticed in XGM 5.6.1 EDU file that there is some differences in the use of weapon_tech for some units, for example : the Greek Legionary
stat_sec 7, 3, no, 0, 0, melee, blade, piercing, sword, 25 ,0.9

here the sword is a blade, while the East Hoplite has
stat_sec 5, 2, no, 0, 0, melee, simple, piercing, sword, 25 ,0.9

I noticed that swords are mostly simple, spears simple, javelins blade and pikes are blade.
Apart from weapons upgrades in EDBT has this any significance for the game?

Thanks

[Suppanut]

It significant in weapon upgrading from temple/blacksmiths

simple = light weapon upgrade
blade = heavy weapon upgrade