Default Purchase Consideration: Series 11
When to Buy the SE: if you have a young person that you want to get into their first communication device or Apple Watch, this is a great option. Also if budget rules, this is your choice. Just be aware that you are missing many of the health features.
When to Buy the Ultra: if you want the best battery life, this is the way to go. Also if you want something that looks different or has more advanced health and outdoor activity features.
Other Considerations
How Long Will you Keep the Watch: even though we recommend considering the SE for a young person, if they are going to keep the watch for a long time or if this is their only communication device, consider going to the Series 11 for its superior set of features.
Color: make sure you pick a color that you are ok that it is always showing. It is not like a phone where you can hide it with a case.