In general - yes.
But keep in mind 80 kgs lower weight, better weight distribution and increased track width. This
will outweight some mm longer wheelbase by far. The optional active diff will improve both traction
and cornering even more.
A BMW 1 series has a much longer wheelbase compared to a Golf. Does it have a worse turn in?
I strongly believe the new A3 and Golf Mk.VII GTI will run circles around the Mk.V/VI platform GTI.