I don't use iOS, and I'm not familiar with their Apple's record on security. However, Google suffered 115 CVEs in 2015 on Stagefright and the Mediaserver. Nexus is a tiny fragment of the Android ecosystem, and most users have 3rd party devices that will never see these completely patched. These flaws are carved in stone in the
Apple may not have ideal security, but at least they CAN issue patches on the core OS that will reach the majority of their users. Google cannot, and this was a staggeringly bad decision. We have not yet seen the full consequences of it.