I don't know if that would hold up better in the long run than normal lumber. This material is straight as an arrow in stores, so that is the allure for me.
I wanted my border to be very rigid along the skinny length so it would be easy to mount a straight line, but flexible to easily conform to my curved laminate screen.
After trying many-many moldings at HD/Lowes, I settled on this "Tuf Board", it fit all my rqmts perfectly. Easy to cut, can be routered for inside bevel, strong for screwing into (I tested it).
I bought (1) 12' board, ripped in half for the big top/bottom pieces, and (1) 6' board, ripped in half, for the RH/LS sides. They came in at 2 1/2 wide.
Below is my test of the bevel and 45deg miter, ready for cutting the real ones.
Workshop above the 3 car garage, COLD! (not heated yet), but big/open workspace. Lots of white powder/dust instead of sawdust.