Quick Sunroof seal question...

[miniblob]

So.... looked on realoem for the part number for the seal and it appears there's a couple of options!!!

The question is, should I use the one piece gasket, or the front and rear pieces???
Anyone have any preferences???
Does it make a difference???
(Car is a 1990 325i touring)

The one piece works out cheaper:
(prices from cotswold on here...)

54121903725 sun roof gasket £68.74 (one piece)
OR
54128106928 front roof gasket £37.49
54121906999 rear roof gasket £52.06

[daimlerman]

The one piece seal is,perhaps,easier to fit and looks a little neater when installed.

These must have been re-manufactured,I paid a lot less than those prices last time I bought a seal!