The Gen 1 release was very similar, but the truck was unprecedented, a brand new concept and was amazing. They released it with a 5.4 until they could get the 6.2 into production. I bought serial # 1583 with a 5.4, it was an awesome truck, not a single defect in it. The Gen 1 went on to be a stellar truck all around.
The Gen 2 was a bit of a screwed up release with a shit ton of trucks sitting at the loading dock waiting for months to get "software updates" my new truck being one of them. I ended up canceling the order, reordering and getting a newly built truck in just 6 weeks. The truck was still freaking awesome and unlike anything else on the market.
The Gen 3 is now playing catchup and Ford damn well knows it. They should have come out of the gate with a kick ass truck- whether it be a standard or "R" model, but instead they introduce a boring looking, boring ass truck. They failed. I for one won't be ordering one, and I foresee sales lacking big time.
Just my .02