Having to log into a Google account that uniquely identifies you across all your devices and milks you of every single data it can put its filthy hands on?
I am an android user but honestly between the two I think Apple is the lesser evil
I mean android is an open source system. You have the ability, if you want to not install any proprietary Google software. You have the ability to gain admin access to the device and inspect, modify, extend, develop all of the code running on your phone.
You do not have this ability with any Apple or any other closed source, blackbox system and in fact you have absolutely no idea what it is actually doing. Apple is orders of magnitude worse in this respect.
An android phone can be turned into a powerful tool of user empowerment. Apple products on the other hand are simply content delivery devices. If Apple wants to show you an ad, record every tap, track your eye movements, scan your files etc. there is absolutely nothing you can do about it. You are using their product and only exactly in the way Apply will allow, not one byte more.