The 13 is DRASTICALLY faster. The OLED screen looks far far better than the old LCD, and because the chin and forehead are gone it’s significantly bigger despite the similar case size. The 13‘s battery life is supposed to be significantly better despite more demanding software than the 7’s battery life was when it was brand new. The cameras are barely comparable quality wise.
That’s a top end 2016 phone compared to a medium+ end 2021 phone. And the difference is incredible.
If you go back to 2010 that would’ve been the first retina phone, the iPhone 4. With it’s little 3.5” display. At this point it almost looks like a different device.