A:Answer There’s not a ton of difference between the U-series Core i5 and Core i7. While bumping up from the Core i3 to the i5 gets you Turbo Boost (the ability to increase clock speed for key tasks), there are no architectural differences between i5 and i7. The base clock speeds on the i7 are faster than the i5 (meaning it’s faster), and you can bump up to a higher clock speed on the i7 with Turbo Boost than the i5. So it’s basically a naming convention, putting the i5 in the mainstream tier and the i7 in the enthusiast tier.
Copied from https://www.laptopmag.com/articles/core-i5-vs-i7
