Being one of the largest passenger aircraft in the world it is not so difficult to recognize the Airbus A380. The easiest recognition point is obviously the double passenger deck over the full length of the fuselage. The Boeing 747 also has a double deck but only along a part of the fuselage.
There is essentially one version of the A380, the A380-800. It is available with Rolls-Royce Trent 900 (A380-841/-842) or Engine Alliance GP7000 (A380-861) turbofan engines.
This is an improved version of the A380-800, with split-scimitar winglets and other wing improvements. The modifications are also available as a retrofit for existing aircraft. It is not yet known whether a new type designation will be given to the aircraft or that only the marketing designation A380plus remains.
Confusion possible with
The Airbus A380 and Boeing 747 have in common a two-deck fuselage, but the A380 has it over the full length and the 747 clearly only partially. Therefore it is unlikely to confuse them.