A better way to look at it is that now you've got a choice when you're headed out on a trip. For me, if it's a short trip with just the wife I grab my 425E. If it's a long trip with a larger group I always grab my 426C. And if you have a griddle it will work better on the 426 as the burners are spaced closer together.
Totally understood, but I'm talking about a permanent mount drawer solution, not something that gets switched out. My 425E rides around in my truck 100% of the time:

As an aside, is this 426B too "rare" to haul around in a truck all the time?