I use food from a local mill so I don't know anything about either of these feed brands 
Do they have a the same protein percentage?

Do they have a the same protein percentage?
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Is it ok to maybe put some DE in a corner of the run for them to have for dust baths? I never see mine taking dust baths. I keep their feed inside the coop, but should move it outside during the day as well? They seem to come and go from their house when they want to go on and eat on the grower feed.
Chickens typically don't need a separate, above ground dust bathing area unless the ground is very hard, compacted, or frozen. Is your run like that? A switch to deep litter would allow them to bathe in the run and the compost should create enough heat that the run won't freeze even in winter.
DE use is a very controversial topic on this site.
common options are regular dirt from the yard, sand, peat moss, wood ash or a combo of materials.