These are no faster than cable maybe a bit more convenient if you a at home and you want ot just put your phone down for charge, but apart from that the Apple cable beats them for speed every time. I dont know what they are like onb the Galaxy because Ive never tested them, but I did this and I let it warm up same as others I tested and it took 1 hour and 10 mins to charge my iPhone by 10% if you are just laying it down like I say this is fine.
If it was like the roungd ones you have to make sure the phone is placed in middle or you could just, well not be charging. Thgis one is easier becaue its got a stand and you can what my full review to see how it compared to cables and cheaper models below, see what you think...?