Apple

GPS + Cellular model lets you call, text, and get directions without your phone
Large Retina OLED display
Up to 2x faster processor than Series 3

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LEAVE YOUR PHONE IN YOUR POCKET: Apple Watch SE GPS Model lets you call, text, and get directions from your wrist, while leaving your phone in your pocket. It offers multiple connectivity options, including: Bluetooth, Wi-Fi, and NFC to suit your needs, whatever they might be.
LARGE RETINA OLED DISPLAY: The SE sports a bright LTPO OLED Retina display, giving you a bright screen you can view at a glance, even in bright sunlight. A variety of watch faces are available for the SE watch, including faces that provide essential information for specific activities.

GPS + Cellular
Always-On Retina display
30% larger screen

GPS
Always-On Retina display
30% larger screen

GPS + Cellular model lets you call, text, and get directions without your phone
Measure your blood oxygen with an all-new sensor and app
Check your heart rhythm with the ECG app

GPS model lets you take calls and reply to texts from your wrist
Measure your blood oxygen with an all-new sensor and app
Check your heart rhythm with the ECG app