Amano Vs Masa (Final Augment)

Hello everyone! I try to make some sense of something:
Could it be possible that SE made Amano on par with Masa if we WS at ideal conditions so every 1000TP

I'm not good on math but here it goes:

I used those numbers:
White damages = 15% of total damage.
Weapon skills = 85% of total damage.

After Final augment:

Amano: Dmg 326
+ 27% Tachi Kaiten damage (Since it's multiplicative)
SC damage + 5%.
+60 Accuracy
+10 Stp

Masamune: Dmg 319
+70 STR = 7-8 weapon damage
+ 10% Tachi Fudo.
50% triple white damage


TP phase = a
WS phase = b
Total damage = c = a + b

Kaiten = a + 1.27b = c
a (0.15) + b (1.27×0.85) = c
a 0.15 + b 1.08 = c 1.23

Masa = 1.50a + 1.10b = c
a (1.5x0.15) + b(1.1×0.85) = c
a 0.23 + b 0.93 = c 1.16


I'm probaly mistaken in many places, but is it still true that Masa is totally better than Amano with the final upgrade, considering the higher weapon damage of Amano?

What's your RL experience?

Thank you!

Btw, dont just say that my math sucks, i know ; P !!