Not sure where this fitted at first, but thought here is a good place..
We all know the Nordschliefe is 'not entirely accurate' (Being as polite as I can) in FM
But with various discussions over width have ensued, I spotted a comparison photo posted on other forums, that has the same car on the same piece of track in both games, so did a quick mask/copy/paste and looked at how they differ (just in width at this one point..)..
I've overlaid the track extent lines, and although not totally scientific, it's approximate enough..
I'd say GT5 seems to accomodate 3.9-4.0 Car widths
And FM4, definitely 4.5
At this one place, it's clear FM4 is somewhere between 10-15% wider.. not ideal, but certainly not the 2x that is being touted..
Of course, I am assuming that GT5 is the 'reference' to real life, I've not got any photo's I can compare with the same car etc to ensure FOV can be easily removed from the equation..
Points of assumption
- It is the approximate same location for each, I believe the FM4 one (taking FOV into account) is slightly further back from the corner, I am assuming the track width doesn't change massively between these two points...