TZ wheels have holes for the bearing cap....if you want them for their accented ventilation holes then accept the hole and paint the cap silver. If not go with the GTA style. As a matter of interest my Lightweight has what you refer to as the TZ rims and my Spider has the GTA type but in the 14" variety.
'57 Spider Veloce, '57 Lightweight, '60 SZ, '76 2000 Spider. '60 Sprint