i3 VS i5 VS i7! Which one is better?

Intel has started giving a name scheme to their CPUs.There is a difference between desktop and mobile CPUs.

The naming scheme is used to seperate the CPUs on their performance.

Comparsion:

Core i7:
Frequency: 2.0-3.5 GHz
Turbo Boost:YES
Cores: 4
Hyperthreading:YES
Smart Cache: 8MB
TDW:35-84W
Graphics:Intel HD 4600

Core i5:
Frequency:3.0-3.4GHz
Turbo Boost:YES
Cores: 4
Hyperthreading:NO
Smart Cache: 4-6MB
TDW:35-84W
Graphics:Intel HD 4600

Core i3:
Frequency:2.4-3.6GHz
Turbo Boost:NO
Cores:2
Hyperthreading:YES
Smart Cache:3-4MB
TDW:35-54W
Graphics:Depends upon the frequency.

The summary of the whole thing is:
- Core i5 and i7 have turbo boost and i3 doesnt have it.
- Core i5 and i7 CPUs have 4 cores while Core i3 has only 2.
- Core i5 CPUs dont have Hyperthreading.

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And note this is my research.
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