Jasmine top, Japanese bottom
They have a completely different consistency when cooked and are used for different things.
it's has a similar stickiness, the taste is a bit different, but better imo.
it pairs well with asian dishes as opposed to american rices and can be used for sushi.
it's not 1:1, but it's certainly a good substitute when you can find japanese rice.
Surprising, because while its widely available in California it seems to be a tiny minority of available rice. A search I did says it is 80% of California's crop, so presumably a lot of it is exported?
There is no "best rice" any more than there is "best pants".