Apple Watch 8?

Hi Xraynancy

Welcome to the Apple (user-to-user) Community.

Re: What’s the difference in a fall alert and the crash alert?

Apple support has articles online that can give you all the details:

Use Fall Detection with Apple Watch - Apple Support

Eg: says:

"If Apple Watch SE or Apple Watch Series 4 or later detects a hard fall, it can help connect you to emergency services if needed".

"If Apple Watch SE or Apple Watch Series 4 or later detects a hard fall while you're wearing your watch, it taps you on the wrist, sounds an alarm, and displays an alert. You can choose to contact emergency services or dismiss the alert by pressing the Digital Crown, tapping Close in the upper-left corner, or tapping "I'm OK."

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Use Crash Detection on iPhone or Apple Watch to call for help in an accident - Apple Support

Eg: Says:

"If your iPhone or Apple Watch detects a severe car crash, your device can help connect you to emergency services". (More info in the above article)

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One of the others alerts:

Heart health notifications on your Apple Watch - Apple Support

Eg: says:

"You can enable notifications from the Heart Rate app on your Apple Watch to alert you to high or low heart rates and irregular heart rhythms".

All the best :-)