Unless I misunderstand, AWS SnapStart and their memory snapshots are the same feature (taking memory snapshots to speed up cold start). It doesn't seem a fair comparison to ignore this and my assumption is because AWS Lambda SnapStart is faster.
They are comparing the baseline product of all three platforms. Why should we take paid add ons into account for 1 platform.
As I mentioned, if you are ok with paying, then you should also compare Provisioned concurrency on AWSbas well, which has 0 cold start (they keep a prewarmed lambda for you).
Product comparisons are not purely technical in nature. As a user, if im paying extra, I would much rather the 0 cold start than just a reduced cold start especially with all these additional complexities.
Python Workers use snapshots by default and unlike SnapStart we don't charge extra for it. For many use cases, you can run Python Workers completely for free on our platform and benefit from the faster cold starts.