There is absolutely 0% difference. Any tail light between 93 and 11 will bolt on. The only thing you need to be aware of are 'two bulb' and 'three bulb' setups.
A three bulb setup refers to where your turn signal and brake light are separate. Turn, brake/park, reverse.
A two bulb setup refers to a system where the brake, turn, and park lights are all combined onto one bulb, vs two; also known as a 'combination' signal.
On the Ranger, the three bulb setup was used up until 2000 (from 1993, at least), 1999 being the last year. In 2000 and all the way to 2011, the two bulb system was used.
While two bulb vs three bulb doesn't change whether or not it will bolt onto the truck, you may find you have a problem getting the actual lights into the housing. For the most part, just looking at it and seeing how many 'chambers' (where the bulb twists into) is a dead giveaway.