Both models i5-3570S
are based on Ivy Bridge
"Ivy Bridge is the last Intel microarchitecture for which there is official driver support for Windows XP . It is made under 22 nm Tri-Gate transistor (""3D"") technology and is basically a Sandy Bridge shrink. It has PCI Express 3.0 support and RdRand instruction for security tasks."
Using the multithread performance as a reference, the i5-3570S gets a score of 102.4 k points
while the i5-3470 gets 82.1 k points
Summarizing, the i5-3570S
is 1.2 times faster
than the i5-3470
. To get a proper comparison between both models, take a look to the data shown below.