Java saturation has its differences from Bedrock, but that can be fixed via an addon. Those who have played both versions may have noticed that the speed of health regeneration is much faster in Java. In Bedrock, it seems like ages pass before any hearts are restored.
As you can see above, thanks to the addon, your health starts to regenerate immediately as you fill the saturation bar. For me, Java Saturation is a no-branyer.