What is a difference between I3 and I5 processor?

The key difference between i3 and i5 processor are:
1. i3 is cheap compared to i5
2. i3 have less core so it has less processing power while i5 has more core so have more processing power
3. i3 have less cache memory than i5
4. New i3 gave 4 cores while new i5 have around 6 cores
5. i3 doesn't support hyper-threading while i5 does

The key difference between i3 and i5 processor are:
1.  i3 doesn't support hyper-threading while i5 does
2.  i3 have less cache memory than i5
3.  i3 is cheap compared to i5