Ayra Vs. Mia

There will be another comparison yet again, so... let's take a looksee here. Both Ayra and Mia have the base raw total of 163 BST, which is one point higher than Brave Ike and Dorcas, but falls one point short from Joshua.

Ayra
+ Weapon grants Spd+3
+ Weapon compares Speed to further accelerate Special
+ Comes with a powerful 2-turn Special, Regnal Astra which triggers in almost every battle Ayra commits to
+ Innate Swift Sparrow pushes her offensive stats even further
+ Excellent offensive spread and good physical bulk
- Lower base Res than Mia

Mia
+ Weapon grants Atk+3
+ Weapon is essentially a stronger Wo Dao, granting +10 damage when an offensive Special activates
+ Innate Flashing Blade accelerate Special by comparing Speed, making Phantom Spd seal a good choice on her
+ Base 40 Speed, officially the fastest unit in the game
+ Great offensive stats, average physical bulk
- Lower base HP and Def than Ayra
- Does not have a unique Special

Both
+ Both have very similar offensive spread and bulk
+ Both have stat-boosting effects
+ Both have very consistent niche
- They both wish they have more B-Slots to use both Wrath and Desperation, assuming the latter becomes a Seal

Ayra went uncompared as a powerful Player Phase unit before the release of Mia. With Mia in tow, she's yet another speed demon to be reckoned with.

Are they equal in usability or does one of them have an advantage against one another? What is your opinion and why?