What speed your character, in this case Anakin, has doesn't matter. It won't make a difference if he has 500 speed or 150. What matters is Gear/Relic level, Mod rarity (5 star compared to 6 star), zetas and or omicrons. Example:
- Both Anakins are G12 with the Zeta and 6 star mods. The Anakin who has more gear pieces equipped is going to have more speed.
- Both your and the enemy Anakin are R7 with the zeta. However, yours has 5 star mods while the opponent's has 6 star mods, so the enemy ship will have higher speed.
- Both Anakins are R7 with 6 star mods, but if you have his zeta on and the opponent doesn't, your ship will be faster.
- Both Anakins are R7, have the zeta, and have 6 star mods (just to clarify, upgrading from 5 star to 6 adds speed to the ship, upgrading from 6D to 6C or even all the way to 6A doesn't, it just gives your ship more GP and maybe a bit more HP), both are going to have the same speed.
Those are just the most basic examples I can give, but the point stands. How much speed, defense, offense, health, etc., the character doesn't impact those stats on the ship. What gives your ship more speed is gear/relics, how many 6* mods you have, do you have the zeta and/or omicron on (I can't say for certain about the omicron, I don't pay attention to that, but the zeta definitely adds 1-2 more speed to the ship).