F355 OEM S-01 265/40 tires wider than most 295/35

was checking into swopping from the oem bridgestone expedia s 01 265/40 , 225/40 to 295/35, 235/40........the expedia is very "square" treadwidth prob the widest for given size that i ever seen or read about. even beats the potenza S-02 is quite wide. ie bfg kd 295/35 treadwidth only 9.7 inches vs the 265/40 s01 at 11.1

compared the michelin ps 2 265/30 for my c32 to the s-01 about .75 inch difference. the ps2 actually have a differing contour to shoulder outside vs inside. (inside more square).
also compared to 255/40 S03 on my 3000gt also big diff even allowing for size.

this is just physical data i can't correlate to actual grip where compounding and shape may lend to better performance.........