No, this is not an error.
Halo Scorpion Tank: http://halo.wikia.com/wiki/M808B_Main_Battle_Tank
C&C Scorpion Tank: http://cnc.wikia.com/wiki/Scorpion_tank_%28Tiberium_Wars%29
I thought this would be a fun match.
Situation #1: Both tanks face off in Baghdad Iraq. This is the basic version of the C&C scorpion(without upgrades and stuff).
Situation #2: Same as sit #1 except this IS the fully upgraded version of the C&C scorpion.
Which Tank blows the crap out of the other?