I have bought a set of 89 3 peice taillights a few years ago and after I installed them they just did not look good on the car and to me they seem pretty cheap but that is just me. I know they look nice though with the 3 peice spoiler. Here is a quote from someone on Supraforums but like he said it is all with in personal taste.
"The pre-89 front bumper looks more aggressive, the tail lights look more like a machine than a luxury liner, and the spoiler looks more functional than aesthetic, imho, and all those things are exactly the way I want it. I'm very happy.
But you cant say which ones are better, its all personal taste. I'm just glad I got the one I ended up liking the most."