Do NOT use TPS EAD, if you can afford OPT EAD.

OPT EAD is far superior than TPS EAD. If you are currently on legal visa status, the moment you use TPS EAD, you loose your visa status and change to TPS status, which is by definition temporary, and inferior than your legal visa status.

Yes, you can have as many EAD as you want, the newest one will override the older one (in other words, make the older ones invalid), but you can still keep both of them.

What you CANNOT do in TPS EAD but do in OPT EAD?
- apply H1B visa, and have Change of Status from F1 to H1B without leaving US.
- apply Green Card (employer sponsored), and Change of Status to Green Card without leaving US.
- continue to stay on USA even after TPS expires, even if you decide to contine your education in future (re-instate is always an option, but no guarantee to be reinstated.).

Disadvantages of OPT EAD:
- Expensive to maintain status. Everybody knows how expensive schools are.
- Cannot work legally more than 20 hours on-campus or off campus at all (i know of exceptions such as economic hardship)