A:Answer I haven't figured out the generation, but currently the i3 has 4 cores and 8 threads, while the i5 has 10-14 cores and 16-20 threads, based on 13th gen figures. As far as onboard graphics, all i3 and some i5 have UHD 730, while some higher end i5 have UHD 770. It has a few more execution units (32 vs 24) and more shader units (256 vs 192). The speeds increase from 1200-1300Mhz to 1550-1650Mhz, and I image the slower speeds on the lower power cpus' vs their desktop variant.
Long story short - Faster at multitasking and running multiple applications at once. Example is doing work on software while it updates in the background. Might have slightly better graphics.