HAHA - thank you for the genuine LOL at the new acronym! I will be using that.
As for the seats, I realize seat comfort is highly personal/subjective. But the SV/SR seat has an adjustable seat cushion angle that the S doesn't have. I found the difference between them was like night and day in terms of thigh support and overall comfort. I wouldn't hesitate to take the SV/SR on a long journey, but the S would need some tweaking before I'd consider it.
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View my fuel log 2015 Micra S manual: 5.0 L/100 km ... 56.5 mpg (Imp) ... 20.0 km/L ... 47.0 mpg (US) ...