I don't believe even for a second that Android devices are any more secure than iPhones. And I use an android phone. But let's be honest - with dozens of manufacturers there isn't a single one who dedicated the same amount of work to securing their devices or engineering things like the secure enclave in iPhones. I use a Sony phone but I'm sure Sony wouldn't have the guts to stand up to FBI, or that FBI would even need to ask - the hardware is most definitely not on the same level of polish as Apple's.