MechaPilot
Explorer
One is martial the other simple. If you think it's "bad", what would you do differently to it to make it "good"?
Well, as a simple answer, I'd make the two of them have more differences than just their weight and their cost. To be more specific, I'd have to test out a few different options.
I've considered giving a trident user advantage on attempts to disarm someone, to reflect the more accurate use of the weapon.
I've considered giving it advantage on damage rolls or changing the damage to something like 1d4+2 (1d6+2 when used two handed), to reflect the greater brutality of the three tines whose backsides are flared like arrowheads instead of having the leaf-shape more commonly seen on spears.