Price and availability of the iPhone XS and the Huawei Mate 20. The Huawei Mate 20 with 4 Gb of RAM and 128 Gb of storage space is available on the Fnac, RRCA from € 799, but also among the telephone operators (Orange, SFR and Bouygues). This is much cheaper than theiPhone XS (64 Gb) which is being sold at 1 155,28 € then his version of 256 Gb costs 1 327,68 € and the 512 Gb is 1 557,68 €. Design of the iPhone XS and the Huawei Mate 20. The most obvious difference between the two smartphones is the variety of colors offered.