Performace wise there is nothing between them, but both have their advantages and disadvantages. Check the FG section on AFF, pleanty of happy EcoBoost owners there. IMO EcoBoost will have better fuel economy regardless of how good or frugal the 6 may be on the hwy, will drive better and feel lighter due to less weight over front wheels and is a lot quiter all round. Overall the ecoboost will be much cheaper to run, service, register etc and still offer the same performance. People will argue that there is no replacement for displacement and that that 6cly is better etc etc, but at the end of the day 90% of people on this forum have chosen a smaller capacity forced induction engine over a V8 so go figure. Few of performance comparison videos to put in into perspective.