300 tdi manifold gaskets diffrences

i removed my 300 tdi turbo and sent it for recon and it has arrived back now, i ordered a new inlet exhaust gasket etc etc. The Britpart gasket has now arrived back and is a totally metallic, where as the one i removed was not. Im a little confused as i googled the part some seem to also come with a metallic part for the exhaust side incorporated into them where as others do not, to add further confusion i seem to have 2 port a metal gasket supplied by the turbo reconditioner which im sure was not there when i removed the turbo ??

there seems to be 2 diffrent types of gasket one with a G suffix at the end ??

http://www.land-rover-parts-shop.co...Seals&group=Exhaust Manifold Gasket&year=1996