I've been looking at getting a different pickup and have it narrowed down to 2. Both are F150s both are ecoboosts. I don't claim to be much of a gear head so here I am. The 11 has fewer miles (15K fewer than the 13) but I've read on the web that the turbo is slightly smaller. The 13 has more miles and has been smoked in. Not nocking it, just don't care for the smell and I know it's hard to get rid of. But if what I read is true, it has a bigger turbo. I don't see pulling anything more than a boat or 4 wheeler on a regular basis, but have no experience driving an Ecoboost to know if it's a difference worth getting the panties all bound up over. Oh and both are priced virtually the same. Thanks for any input