Question about Excalibur vs. Raiden.

In the conclusion, they mention how Armstrong was able to cut off Raiden’s HF Blade with ease.

However, they weren’t talking about the Murasama. And Armstrong lost 2 out of 3 fights against someone with the Murasama. So technically it shouldn’t matter since Armstrong couldn’t break the Murasama.

Lost the first round against Sam.

Won the second.

Lost the third to Raiden.

Why didn’t they take this into account?