Expo Genymotion vs Android Physical Device


I am testing some code on both Genymotion android simulator through expo and also on a physical android device. Both are showing same components differently.

Just wanted to ask is the smartphone physical device the correct display once bundled or is the emulator the correct display?

I know I have read physical device is better to test, but just want to make sure it is accurate as seen on that specific physical device compared to genymotion emulator?

Thanks so much.