Developers would care. For many that difference would double their margins, or quintuple them. People would make apps for Android that didn't exist on iOS, or make them for Android first, or spend more time on the Android version and make it better.
Yes, but consumers of the phones themselves? Anecdotally, I haven't paid money for an app in...5 years or so. So the free apps would still be around, and I guess candycrush and such would get to Android before iPhone, and will be better on Android, but that really isn't going to affect me.
I guess the question is how many phone consumers buy apps (or pay for content in those apps)? And if paid app availability improved (or got worse for their platform), would that affect the next phone they bought.