The latest LG Gram 14 drops the ball on performance when even its previous generation Core i5-8250U configuration can outperform the newer Core i7-10510U configuration in raw processor performance.

Generally speaking, a U-series Core i7 CPU should be faster than a U-series Core i5 CPU. With that in mind, a newer 10th gen U-series Core i7 CPU should definitely be faster than a 7th gen U-series Core i5 CPU. Unfortunately, at least one OEM hasn’t gotten the memo.
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https://www.notebookcheck.net/Apparently-LG-thinks-it-s-okay-to-sell-a-10th-gen-Core-i7-laptop-that-s-slower-than-the-7th-gen-Core-i5-model.459953.0.html