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Conclusion:
1- Huawei P Smart 2019 LCD screen is higher and wider than Honor 10 Lite, and could be visually distinguished from the bottom edge width.
2- Because of tiny difference on height&width dimensions, Honor 10 Lite LCD screen could be installed on most of P Smart 2019 but P smart 2019 LCD can't be installed on Honor 10 Lite. (LCD&Touch function are both tested well for compatibility.)