when i researched the difference between opti and etec i found that performance wise not much in it but economy wise the opti seemed to come out best, and by a reasonable margin in many cases. In my opinion they were putting the etec against the verado as it was an easier contest, however the optis are faster and more economical and lighter than the verado, but noisier i know but i like the noise, and in most tests in the usa the optis are more economical than the etec.
mercury are pushing the verados and downplaying the optis, even making the optis for 2006 look bland.
all good engines but i am very happy i chose opti,
and cheaper as well....