Anyway, back to this post. Not only have we covered this exact same question in the past, but your question is illogical. You literally just said:
"Like what? Unless its something only the iPhone can do, Nexus can do it and much more."
Just as I thought, more garbage. Here are just 10 big things the Nexus can do the iPhone can't. You let me know when you have a worthy list of what iPhone can do Nexus can't.
Run on 4G
NFC
Removable battery
Manage files
Attach anything to an email
Use multiple keyboards
Use a custom launcher or ROM
Flash
Widgets
Set a custom ringtone without using a computer