Pretty sure either car will be able to be GM certified for an extended warranty. I assume option B is also a Z06 ? Personally for me I never saw the need for the extra power of the Z06 and i will never track the car . But you might want it . Also a huge fan of these low mileage cars. And at 1700 miles that certainly qualifies. While 8000 is low miles certainly it is more in line with what a lot of owners are putting on their cars as many of us do not use these cars as daily drivers. If it were I , I would want someone I trust and knowledgeable to actually look and touch the car, but that is me. I tend to be a bit of a perfectionist and not very trusting of what salesman tell me.
Think you will be happy either way so find the color and options you love and go for it. But do invest in the extended warranty from GM. Cheap insurance overall.