High Base attack and Speed.
Fairly good movepool.
It can Mega evolve giving it a greater advantage over Archeops.
Basically it will faint upon being hit with a super effective move being it has low defensive stats.
Same as Aerodactyl great speed and attack.
It's fragile as well except it's ability is Defeatist which makes all stats go.down upon having a little less than half HP.
Overall Aerodactyl is better since it can Mega evolve adding to it's already high Attack and Speed.
Hoped I Helped.