Comparing 2002 and 2003 quite a few differences show up.
I was aware that 2000 was shorter than other 4-seater Alpines and I obviously know that 2003 is standard length and the side panels are continuous at the rear. Well 2002 is standard length but the side panels have a join near the back of the engine hatch.
There are other differences around the rudder and P-bracket area but what is original and what are later changes I haven't yet worked out. 2002 doesn't have the socket for the jack staff on the rudder hatch cover - was that an optional extra? The battery support is towards the back of the engine bay on 2002 but still on the right whereas I seem to remember that 2010 has it on the left (about as far back as 2002's). I haven't yet determined whether it's been moved but it's different at the top to that on 2003 which is mounted on the right near the front of the engine compartment. The blanked-off exhaust outlet in the transom is in exactly the same place as the one on 2003 but I'm unsure when the second one was constructed. The nuts are very rusty so it isn't recent but the strengthening rib nearby looks very amateurishly bent.
The only differences I've spotted so far further forward are that the ski/lifting pole is shorter below decks and held with less rivets on 2002, 2002 doesn't have the starting handle hole in the back seat but does have the ski hole in the back of the front seat which 2003 doesn't. (Which Continentals have the hole?) There are other holes in the back seat of 2002 but I haven't yet determined if they're original and, if so, what they were for.
It's looking like 2002 and 2003 are very much transitional models between 2000 (the prototype) and later production models.