There's a difference. As an example, the diameter of the rear bar fitted to an NA 2+2 is 21.0mm. A T T has a 25.0mm bar.
no they are in fact different , i run 32m front and 28m back both impul, so yes the bushes are different
Source of information: NISSAN Factory Service Manuals. 2.0 NA rear bar diameter of 15.9mm 2+2 NA rear bar diameter of 21.0mm 2.0 TT rear bar diameter of 25.4mm 2+2 TT rear bar diameter of 25.0mm The answer to your question is MAYBE. You have not specified what the bar is going on, or what the bar came off. Provide the VIN of the 2.0 & the VIN of the 2+2 & see if the part numbers for the bushes are different between the two vehicles using Nissan FAST.
He is asking about sway bar bushes difference not rear bar differences. The oem sway bars did have different sizes in diameters the 2+0 rear sway bar was the smallest with the 2+2 being the biggest sized. Most aftermarket sway bars are bigger diameter again. Also i think the front sway bars are always thicker then the rears but i could be wrong.
According to Nissan FAST. 12/1993 2.0 TT Rear Sway Bar Bushes Part No.54613-39F01 03/1990 2+2 TT Rear Sway Bar Bushes are the same Part No. 10/1989 2+2 NA Rear Sway Bar Bushes are the same Part No. 07/1991 2.0 NA Rear Sway Bar Bushes Part No.54613-16V00