ur comparing a boat to a jet fighter here buddy
the rx7 is a perfect sports car light and nimble, go kart style handling and a 50/50 weight ratio. plus there r far and few between in comparison to the r33.
in terms of maintainance it could go either way with 33' s having oil problems leading to needing rebuilds and 13b have apex seal (amongst other) problems which would require a rebuild. if u were to leave it standard there are basic preventative maintainance mods that u could do with both to make them more reliable.
looks wise the rx7 has it all the way. it has a sex appeal that the 33 will never be able to achieve lol