I can't comment on these specific models. I do know that many consider the DeWalt 735 to be the top of the class model in portable planers - and maybe it's priced accordingly. If portability is a requirement, then the pic Bob posted of a Whitney planer might not fit the bill.
I was gifted an old Belsaw 12" planer/molder as my first planer. Cost wise such a beast is no more expensive (used) than the new models you are looking at, but size, weight, and power requirements are all much higher (mine is 220V with either 3 or 5 HP, it's hard to tell on the name plate of the motor). If you want a lifetime tool, these larger 'floor model' planers can take all day use, but don't neatly tuck away under a shelf (Bob's pic doesn't really show a floor model, but I'd hate to have to pick that one up regularly). To seek out one of these you'd have to search regularly on Craigslist or other tool sites, and be patient, but I see such beasts with some regularity in my perusal of these sites.
Some would point out the advantage of SHelix or Byrd carbide insert blade heads (available for the DW 735 and cost almost as much as the planer itself). I would love that, and these make sense for a long term tool. Looking at the models you are, I expect that you are not thinking of such an upgrade (at least this doesn't make sense to me on a 'disposable in 10 years' machine)
Hope that helps, although it clearly does not really answer your question.