If I had to choose between using the miter saw or the table saw I'd go with the miter. The table saw, unless you made a special jig of some sort, would be taking bigger chances, with a lot of loose stuff that could get criss crossed and jammed. With the miter saw, which still is dangerous enough on this stuff, at least you have the backstop to hold it steady against, while moving the blade straight down through the metal. Actually I do have a choice, but choose using the miter saw instead of a table, because of the greater control you have in holding the piece being cut aligned with the blade