Thanks to a friend of a friend, I was able to borrow a seat off of a 2019 ZR and compare it against my 2018 ZR seat.
Even though the fuel tank and console PNs are different, 2018 to 2019, I am happy to report that the seats are completely interchangeable between these two model years.
Further, the molded plastic seat bottoms between these two model years use the same PN, which is further confirmation that thew seats can be swapped.
So, to anyone whom someday may wish to or need to search for a different seat, perhaps this info will be of some help.
A huge shout out to my friend and his friend (you know who you are) for lending me your seat for this comparison! Thank you!!!