What is the difference between these two remedies? Is Muriaticum mre practical and self-controlled?

The best advice I can give you is to find a reliable Materia Medica {Boericke,perhaps} . I believe there are some homeopathic sites on web that will let you read these free online. Try always to know that each rem. is even more individual in what it will cause and cure homeopathically than each persons fingerprints, even when they have certain things in common.{Sodium} and one will never do for the other. So read characteristics of each, more than once, and I'm sure you will be able to see difference. Kent said there are many simillia, but only One simillimum. I think you have more than adequate curiosity so keep persevering. Best Regards, Fredric