Here are the actual stats.

type roman hastati
dictionary roman_hastati ; Hastati
category infantry
class light
voice_type Light_1
soldier roman_hastati, 40, 0, 1
attributes sea_faring, hide_forest, can_sap
formation 1, 2, 2, 3, 4, square
stat_health 1, 0
stat_pri 11, 2, pilum, 35, 2, thrown, blade, piercing, spear, 25 ,1
stat_pri_attr prec, thrown ap
stat_sec 7, 2, no, 0, 0, melee, simple, piercing, sword, 25 ,1
stat_sec_attr no
stat_pri_armour 5, 4, 5, metal
stat_sec_armour 0, 1, flesh
stat_heat 3
stat_ground 2, 0, 0, 0
stat_mental 6, normal, trained
stat_charge_dist 30
stat_fire_delay 0
stat_food 60, 300
stat_cost 1, 440, 170, 50, 70, 440
ownership roman

type roman triarii
dictionary roman_triarii ; Triarii
category infantry
class spearmen
voice_type Medium_1
soldier roman_triarii, 40, 0, 1
officer roman_early_centurion
officer roman_early_standard
mount_effect horse +4, chariot +4, camel +4
attributes sea_faring, hide_forest, can_sap
formation 1, 1, 2, 2, 3, square
stat_health 1, 0
stat_pri 7, 7, no, 0, 0, melee, simple, piercing, spear, 25 ,0.73
stat_pri_attr no
stat_sec 0, 0, no, 0, 0, no, no, no, none, 25 ,1
stat_sec_attr no
stat_pri_armour 7, 5, 5, metal
stat_sec_armour 0, 0, flesh
stat_heat 4
stat_ground 2, 0, 0, 0
stat_mental 10, disciplined, highly_trained
stat_charge_dist 30
stat_fire_delay 0
stat_food 60, 300
stat_cost 1, 500, 210, 50, 80, 500
ownership romans julii,romans brutii,romans scipii,romans senate

Triarri have a mount_effect yet hastati do not. Not sure why it shows up in whass-is-names database. At any rate, the +6 to elephants and chariots is from the light auxilia.