Now, the speed improvements you can look forward to will differ from carrier to carrier, but for the most part, you will see some improvements. It does not appear to be too big of a jump so don’t expect it to be too noticeable, but it will be faster, although whether or not you can tell is another story. This is compared to the iPhone XS and XS Max from 2018.
https://twitter.com/SpeedSmart/status/1171548724239224832
SpeedSmart has since been asked to compare the speeds against some of Apple’s 2019 Android competitors, in which they claim that once they get their hands on the phone, they will run some comparisons. The new iPhones will continue to use LTE as Apple is only expected to introduce 5G to its iPhones in 2020.
5G speeds should greatly trump LTE speeds, but once again, how it fares against other 5G phones will depend on a variety of factors, like software optimization and also choice of hardware.