Not sure, I have iPhone 13 pro max and it works properly . on Anker website they said ”Compatibility: iPhone 15 / 14 / 13 / 12 Series” they didn’t list the iPhone 11 as compatible.
Both devices are good , I used the 633 for few months now and I review it on the channel . For the usb a port it might be useful for you and it’s your choice to purchase the device that suits you the most . If you mean charging fast is not good because battery efficiency get less with time I think wired charging is similar or faster than 15W depending on the device you are charging , thank you for your feedback :).
It depends on your preferences , this device is slightly bigger and heavier than the 633 . For me I prefer the fast charging and the 10k capacity but if weight and size is issue it’s better to purchase something useful for you .
