As long as its the same physical size & CCA rating you should be good to go. Lots of people don't go with the HD branded battery and have lived to tell about it. I'm one of them 
Pretty sure that would be Deka.....and I would believe that someone makes the 'HD' battery anyway.....could be the same company....
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it is deka. Aka east penn mfg. They're the oem for hd, bmw, and mercedes, among others. Pretty sure they're also the originators of the agm battery, but could be wrong on that.
A little cliff claven factoid for the thread, there are only two battery manufacturers left in the us: East penn and jci (johnson controls).