Maths
Up-front costs:
$260 - Odyssey
$75 - Interstate from Costco
Warranty:
Interstate 3 years full replacement
Odyssey: 4 years full replacement
Expected life:
Interstate: 4 years.
Odyssey: 8 years
Final price:
Interstate: $75 x 2 = $150
Odyssey: $260 x 1 = $260
[I will not consider pro-rated returns for Interstate as it makes calculations too complex]
Notes: For Odyssey to break even - it has to last at least +12 years or $75 x 3 = $225 ; even then Interstate comes out cheaper. To be noted here - Costco offers 2% cash back + 1% for Costco CC so brings down Costco price even more and as noted above - the 2nd. Interstate will be cheaper as Costco will give back some $$ for the 1st - as pro-rated. Also personally I don't think Odyssey will last 12 years.
Finally, I don't presume many will keep the car for additional 12 years so the up-front cost won't break even, ever.
Not sure though of running conditions - i.e. having such a great battery - does bring with it peace of mind ; for example waking up on a freezing cold morning and finding battery dead - giving a $ figure to that is tough. Then - having such great reserve power, awesome CCA ratings - those do add some serious +ve to getting an Odyssey.
However, at the same time it balances out with the fact that Odyssey batteries are a little harder to maintain perhaps - even their website states the importance to keeping its charge always above 12.x V otherwise its life will be drastically reduced, etc.