I used to manufacture industrial items that were sewn, and had 4 working and 2 spare(stand-by) all were Singer a couple were 50 years old(then),
Unfortunately the spares got harder to obtain.
I looked at a Brother dual needle as new replacement.
Thread? .....I used two type only , they did everything I needed.....One was a kevlar type, and the other was a Stainless Steel one(for higher temperature)

Advantages of these?........Yeald , they generally don't break in the machine.

Disadvantage? .....Only one real one........Don't under any circumstance try to break the thread by wrapping the thread round your hand and trying to snap it.......You'll only hurt yourself