Is there an advantage between?
Answer:
Bleeble blabble,
I don't think anyone will be able to answer your question for two reasons:
1) The formulas that you give don't make any sense. Is the first one supposed to be sodium sulfite? There is no such thing as SO3Na+, but sodium sulfite would be Na2SO3. The second one seems to be some kind of ion with sodium and selenium, but sodium and selenium would not combine in this way. Please go back and check the chemical formulas for the substances you are talking about.
2) Once we know what substances you're talking about, in order to gauge how well they work, we need to know what you are using them for. Most common chemicals are used for multiple purposes, so you need to describe what the application is.
Post a new question clarifying these things, and I'd be happy to help.
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