here's the thing, nothing is 100% theft proof. if someone wants *your* plate they will get it. the idea is basically to make your plate less attractive/more annoying than the one next to you.
with that in mind either of the solutions would work, since it's not a common tool that your average vandal/thief would have with them. if they are part of a license plate stealing ring (if such a thing exists) then they probably would have the tool handy, since both the expensive and cheap option seem to rely on the same two-pronged screwdriver.
anyway, that aside, i think the $25 is more aesthetically pleasing given it's brushed finish compared to the cheap chrome finish of the other.
that's my