When I bought my Supra in 1999 I also considered the 300ZX as an equivalent. That's how it was back then. Both cars in production but the 300ZX was more of a wide bodied cruiser and nearing the end of its production run. The 300ZX was more styled to that early 80's clear lines Filofax era which made it appealing that has also dated it (akin in many ways to the Supra MkIII body style) relative to the curvaceous MkIV Supra body which still, today, looks almost current apart from a lack of running LEDs.
When I think back 20 years ago, it wasn't a clear choice that to most it appears to be today. However, I am certain if I had bought a 300ZX in 1999, I wouldn't still own it today.