The
2006 rear wing was constant section.
The
updated 2007 car's rear wing now has an anhedral shape - the outboard ends
are lower than the center section in recognition of the differing flow
fields respective areas of the rear wing are encountering. In addition,
the endplates are longer in depth/height and extend above the wing more
so than in 2006.
Spied
at Petit Le Mans 2007 and recalling the apparent cooling issues the RS
Spyder's dealt with in 2006 (below), this vertical gurney is located running
up the inboard face of the radiator inlets. 
In
2006 we speculated that the RS Spyder appeared to have some sort of cooling
issue as the radiator inlet ducts on both cars had outboard blanking panels
and rather large vortex generators mounted inboard just inside the leading
edge of the duct. It seemed more than likely to be a boundary layer
issue within the duct that caused an uneven pressure drop across the radiator.
In this case the blanking panel helps redirect the airflow across the VGs
which in turn energize the airflow as well as moving it from outboard to
inboard within the duct attempting to revitalize the dead area of the radiator.
While never able to get to the bottom of this issue, it was worth noting
in the press material for the '07 update this indication:
"...the thermodynamic qualities of the RS Spyder have also been optimised by, for example, redesigning the air ducts leading into and out of the radiators."
The
fixed rear body gurney is variable height and is taller along car centerline.
The
mandatory rear structure is nicely integrated into the rear bodywork.
Lola's interpretation
contrasts with the Porsche in that the upper corner has a large radius
rather than the sharp corner seen here.
Vertical gurney on the trailing edge of the rear bodywork. Both Penske and Dyson cars had similar (Petit '08).