That's nonsense...
The driving physics of GT7 a far better and far more realistic than the physics in GTS, different cars actually do behave and react differntly now...GTS was far to easy, pretty much all FR cars(or all Gr3 cars) behaved more or less the same, once you've figured it out you could take pretty much all the corners the same way with different cars and there where wide turns you could take flat out with no troubles at al(eg. second turn in Alsace)
Second Turn in Alsace now is a challenge with some cars, you have to figure out how fast you can go and which line to take with every car, and with some you can't do it full throttle like in GTS...I like that:It is more challenging but far more rewarding!
Edit: one sign that GTS was too easy: I completed all CEs in GTS in gold(except Sarthe),even the Nordschleife, and I am not a very good driver(was C/D in the online races, never better) and I play with pad and automatic transmission.So if that is possible, it cannot be a difficult racing game...
So you write an essey about physics when i specified ONLINE. Guess you avoided that for the simple fact GT7s online is a joke, some how far worse then its predecessor.
And both GT7 and Sports physics are fake/easy to drive. Far from real life. I can jump between them easily with no descernable difference, feel liek same old GT. What ever diifferences they make behind the scenes, its still build upon the easy of use for gamers casuals philospphy. The game has no hardcore realism option.