I don't see much difference between the two. The v6 is a second faster 0-60 , no leather on the Sport model, wheels look better on the Sport, decklid is standard on the Sport(extra on v6), no led front lights and it has a weaker radio.
I really like the v6 power, but the gas savings would be nice. All and all I love how the Sport model looks, but I wish I could get leather seats in it.
The dealer told me only 20% of customers opt for the v6. Which one should I go with and why? I plan on keeping it at least 8-10 years.
If by a second faster, you're referring to 0-60mph times, then don't give that a second thought. In real world driving, 0-60mph times don't mean as much as 1/4 mile trap times to get a sense how fast the car will likely be in passing and lane changes, etc. That is, unless all you plan on doing is drag racing from stoplights. It's been a while since I drove the I4, but I remember is was nicer than I expected. Then I drove the V6, and whoa, what a difference. The sound, feel, and of course acceleration just puts an instant smile on one's face.
While the V6 won't get quite the mileage of the I4, over the last 9k miles, I am averaging between 29-30 mpg with maybe a 60/40 split of city/hwy driving. This is better than I4 2012 Focus it replaced, lol. If you like leather, the Accord's has a very nice feel as well. That, with the added touch screen (really makes inputting nav info much easier), LED driving lights, seat heaters, sunroof, etc...really makes the EX-L feel much nicer than the cost.
Anyway, it seems the responses should probably be "Sport" from Sport owners, and "EX-L V6" from V6 owners, so in the end you should test drive both. I can 'almost' guarantee that you will know which one you want after you drive them both. Online research only goes so far...Good luck in your decision.