At present, Huawei does not have a 120w fast charge, and Huawei's charger that is larger than 40 watts can only support 40w fast charge for mate30.
If you use Honor's 100 watt fast charge, you can only use 40 watts, and Huawei's 100 watts and Honor's 66 watts can also be used. It's just not supported by a phone.
No, because the skills between the two are not equal. The output power of Huawei Fast charge 120w reaches 120w. The maximum power used by Huawei mete30 for charging is 40w. Therefore, 120w fast charge cannot be used for charging, otherwise the battery of the mobile phone will be damaged.