Brake booster differences

Hi,

Does anyone know what's the difference between?

1J1614106H (since 2002) -> 1J1614106J (post 2002)

1J1614105S
1J1614105Q
1J1614105T

All are break boosters for ESP mk60 and all are ATE/TEVES made with one G214 break pressure sender. I'm installing ESP in 2001 mkIV platform car and looking for some replacement. Only first two seems to appear in ETKA. Would be grateful for any help.

Cheers.

from a dealership over here-
Part Number: 1J1614106J
Supersession(s): 1J1614105S; 1J1614105T

Ok, so it seems all pressure senders are the same as well as break boost power. Thank you!