Hi,
there are about 5 models listed - see
https://audi.7zap.com/en/rdw/audi+a2/a2/2004-248/5/511-511010/
do you have the option codes for your car listed somewhere? The key thing is identifying which PR- code the OSS corresponds to as the shock variant for specific options is identified on the table.
8Z0 513 025 J appears to be the most plain vanilla shock.
Looking at what is listed - we can eliminate a couple of the other options -
0N1 = Standard rear axle
1GL = Front shock absorption, sports design 2
0N9 = Lightweight rear axle
1GF = Front shock absorption, basic design 3 (AUDI)
1GA = Front shock absorption, basic design 1
8Z0 513 025 N is listed with the 0N9 lightweight rear axle, so probably for the 1.2tdi ; this part is then listed later on with a standard rear axle from a certain date onwards
8Z0 513 025 E is listed with sport shocks on the front suspension, so is probably sport suspension.
Otherwise, to be honest, I don't think you can go far wrong with Bilstein B4s - fitted the same to both our 1.4 petrol (no OSS) and my 1.4tdi (also not OSS) - neither are sport suspension height - and they've been brilliant. Good luck.