I gonna buy a Group C model for legendary Porsche 956.

I see after a research, that I have two options. The Tamiya and the Revell kit.

Which are better (accurate, detailed, no fitting problems, etc.. )?
I gone build the Stefan Belof 's 956 from Spa, were he died in "Eu Rouge" fatal accident. I see that Revell, have a release with right(?) decals.
It's any extra decals (Jagermeister logo's) for Tamiya kits.
Thanks a lot again.