Zafira A/B Power Steering Rack Difference

[noumenon]

Hi,

Does anyone know what the difference is in the TRW 001-0080-052-001 for Zafira A (mk1) and B (mk2)? From what I can see, they are not listed as compatible, yet the TRW number on the casing is the same and I can't spot the difference!

Thanks. =)