Points of significance. 

1.Rear '2000' badge
2.Wider grille (? same as 1750 ? - 99% certain it is)
3.New-style wheels with exposed wheel nuts
4.Door reflectors
5.Optional radial-fin (Turbina) cast alloy wheels
6.(nb. with optional different type wheel nuts)
7.(nb. Australian test car had Kleber 165HR14 tyres)
8.Heater/ventilation slider is black not chrome
9.Air con option
10.Engine - showing canister-type oil filter
11.Nitrided crank
12.Carbs - Weber/Solex/Dell'Orto
13.Slightly larger brakes
14.New hydraulic clutch slave cylinder design
15.Larger fuel tank ? (11.6 v 10.1 galls)
16.LSD (now standard) - except on '72 Canadian cars (BUT listed as £40 option in 1971 UK price list, but standard by 1973 UK price list
17.Tool Kit + bag
18.NB. Metallic paint is optional (£55 in 1971)
19.Also Hardtop (£175)