Chainlink Keepers, Keep3r and Gelato — all the same?

I'm a newbie to keepers, but understand the general idea: Automate actions based on criteria.

With that (very minimal) background, is it possible to compare three providers like Chainlink Keepers, Keep3r and Gelato and come up with some differences?

• Do they all offer the same surface area in terms of possible automation tasks?
• Are any of the interfaces easier/harder than others?
• Are there major differences in the architecture?
• Do they provide different level of guarantee that tasks will be performed?

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Clearly, I'm probably not technical enough to figure this quite out myself, but I'm hoping someone would be willing to do an attempt at a unbiased comparison based on either my criteria or some general understanding of the differences.

Thanks for any insight!