Brake Fluid resivor which ones better?

[eeh1025]

Hey there i have an 86 gt and the fluid holder on this one is metal it has a metal latch that clicks on the lid to seal it, now i also have a 88 mustang that i use for parts, this one has the plastic fluid holder with a screw on top, like the newer mustang have, Is that one better or should i just keep whats on there.
thanks