There's a big difference between 66 watts and 50 fast charges. In the case of not playing with the mobile phone, the same mobile phone power, with 66w fast charge is definitely faster than 50w fast charge.
Let's say they all have 4,000 mah batteries.
If the charging speed of 66 watts is from 0 to 100, its charging speed is about 40 to 60 minutes.
50 watts fast charge. The charging speed is about 60 to 70 minutes.
The 50w fast charge takes 50 minutes to fully charge the phone battery, while the 66w fast charge takes only 40 minutes to fully charge the phone battery.