FYI, the battery for my Sportster DOES NOT have an exact replacement in the aftermarket brands like Odessey...but the good news is HD Battery does use latest Electrolyte Conserving Technology, packaging high density plates with thin separator design in thin plastic case [basically all the elements of modern batteries by Yuasa (probably their OEM maker) and others].
Like Smitty & Jack K stated, the HD Battery works just fine...just remember to use a Battery Tender to keep the surface charge up...you will do fine, even well below freezing. Keep in mind, that you may want to put a switch in (or cutout relay) to keep the headlight OFF during cranking...every little bit of parallel current lost to non essential accessories is taking away from the CCA reserve of the battery when starting.