The earlier Toyo T1R is considered a better tyre than its succesor the TR1.
I'm in the same boat as you in that my car came with almost brand new T1R's that are dated 2013 front and 2014 rear. They even have the green marker in the tread.
I thought I had dropped lucky when I saw the tyres but when I got home I saw the date stamps and did a double take.
I even checked with Toyo.
The Falken 310 is rated better than the current Toyo TR1 by Tyrereviews.
I plan to go 205 x 15 all round with the Falken 310...or 195 x15 all round with Michelin PS3's which are superb tyres. I have them on my MX5 and the grip, feel and roadholding are amazing.
I'm not bothered about the TF stagger front to rear.
By all accounts the Falken 310 is a very quiet tyre which I believe is not directional.

Tyres can be a touchy subject!

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