Err..the photos of highly-seek, hunted-by-most JDM/AUDM/NZDM/USDM bodyparts could be endless, but just going to be brief. Seefoo "hdz" would have tonnes more.
Series 0 FWD SR20DE/KA24DE (stock) bumper with SSS foggies and lip (as I'd like to call it)
Series 1 ATTESA 4WD SR20DET bumper and lip
Series 2 bumper and lip, some call it blacktop, some call it the 1.6/1.8 version..too many variations. But I did see a wrecked/halfcut U13 with this bumper and came with SR20DET.
There's only one type of factory side skirts and2 types of optional rear end caps for certain markets. Rear Bars (Bumpers) for the 1.6/1.8/2.4-litre JDM would have the plate in the middle, unlike other markets where the plate number cuts off up to the bootlid - other words, less Dugong-feature, which translated to nicer ass.
And yes, there are two types of Grille design and the most "likable" would be the lower end, lower spec-ed grille (as per above photos), came with body's colour or chrome for some trims (1.6/1.8-litre if I'm not mistaken). And yes, the high end ATTESA/ATTESA LTD carries similar grille as the local altima grille.
And there are known 2 types of boot (trunk for those in the States) spoilers, the 3-legged JDM/ATTESA (some comes bigger/wider) and 2-legged USDM.
Although you can't deny the existence of 2-3 more types to fit the U13 body (USDM/JDM aftermarket spoilers, with slight difference than stock and also the ARX). Even the local altima has an ATTESA-3-legged type spoiler for some trims albeit in bigger size.