Well... The gen doesn't really matter if the intel core is greater, does it ?
An i7 should have a way better performance than an i3. Or am I missing something here ?
Generation does matter when it is more than 3 generation apart. Each generation brings a little bit of improvement over the previous. Some of the specs I already listed above. The i3 is better because it has higher core speed, and can use faster RAM. The system that come with newer CPU is more likely to come with newer, and faster RAM. In general, it would probably be a faster system overall.
The number after the "i" only matter if you compare the same generation, or one or two genration apart (tech hasn't make a big leap yet). Higher number usually mean better, fancier tech, more cores, higher core speed, support faster RAM, higher price, better performance in some area. The i3/i5 are marketed for budget system, and usually come with less core than higher performance, higher price i7/i9.
According to this benchmark, a newer 10th gen i3 still can (marginally) out perform much older (top tier) 4th gen i7
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And it mop the floor with my weaker laptop version
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