Sigh you are comparing single core to multicore apples to oranges with two different devices.
A51 according to notebook check
0,347 single core
1,229 multi core
While the a13 is about
1,300 single core and
3,300 to 3400 multicore depending on device.
Aka 2.7x to 3.7x faster the speed if the benchmarks are correct.
Just thinking about benchmarks and the limits of them,
while at the same time marveling at the sublime power that is apple silicon.
But the $399 iPhone SE should be performing better in Geekbench than the $1099 Macbook Air with the quad core i5, also the marginally faster quad core i7. Almost but not quite 1100 single core with the i7 1060NG7 and a little better than 2800 multicore.
This is because that i5 is a Y series chip.
It really underlines how much hardware is in the $399 phone. I wished someone did a good keyboard dock for $199 or $299 where you can have a netbook clamshell and run the netbook off the iphone SoC.
Of course we will never gonna get this. We never gonna get the ability to run our own software on that awesome SoC with the form factors we want by design. Apple wants you to get an iPad Air (A12 for $499) or an iPad Pro ($799 A12z), or a macbook Air ($999 for dual core i3, $1099 for quad core i5.) Note those iPads prices are not counting 3rd party case, keyboard, and touchpad to make them effectively laptops. So much hardware in that $399 phone but without the user interface to access it. It is the new device tax where apple used to be charging outrageous mark up for ram in laptops in the 00s, and flash upgrades in the 10s.
Besides the user interface and the software / os the first real hardware limitation of the iPhone SE's limitation is its 3gb of ram, the same ram in the iPad Air (2019, $499), but the newer iPad Pro gives you 6gb, and the macbook Air is 8gb.
So much hardware in that small price package. A faster silicon than any intel silicon until you step up to 15w Ultrabooks.