I have found the Edmunds TCO high on all of my own vehicles but it gives a good short and long term cost comparison between similar models of different trims. The EX-L I4 w/ Auto vs. the EX V6 w/ Auto in this case.
___The EX-L I4 w/ Auto includes heated seats and XM Radio. It does not include struts for the hood, Homelink, passenger power seat, TCS, or a trunk liner but the trunk liner can be added afterwards. Is there a hood liner on the V6? If so, can that also be added to the I4 afterwards?