Best Heavy Scorpion? | Age of Empires 2

Let's find out who has the best Heavy scorpion. I picked 4 civs, the Celts with twentyfive percent faster fire, twenty percent faster creation time and plus forty percent more hit points. Next we have the Kmai with plus 1 range and their unit tech that porvides one extra projectile. the Romans because of their sixty percent lower cost gold, the thirtythree percent faster fire and their benefit after researching ballistics. The Chinese with the huge plus 4 attack from their unit tech, although the lack siege engineers.
Civs like Dravidians, Slavs, Teutons, Bulgarians, Ethiopians and Mongols are left out because their bonuses are not as impactful or are situational, like the Mongol's unique tech with fifty percent faster movement on siege units, it is an awesome bonus but in these tests does not make a difference.
What are you thoughts on them?