If you are considering the diesel, look into the costs of fuel and maintenance (and the upcharge for the diesel engine) vs fuel economy. It will very possibly work out in favor of the gas engine.
I ditched my deisel and went gas. On these light trailers, the diesel was overkill. Really, even the hemi is overkill but it is nice to have a full size truck, and the extra power.
2010 Escape 19
2012 Ford F150 Ecoboost