The only difference is the price

Orbeco-Hellige’s new Powder Pack Reagents are pre-measured, unit dose DPD reagents that have been specifically formulated for use in Hach* colorimeters, spectrophotometers and test kits as well as in Orbeco-Hellige’s new colorimeters and test kits. The DPD Powder Packs are available in 5 mL, 10 mL and 25 mL sample sizes and come in 100 or 1,000 count packages.
*Hach is a registered trademark of the Hach Company.

Description Unit Hach P/N Orbeco P/N
DPD Free Chlorine Reagent Powder Packs 5 mL sample 100/pkg 14077-99 RP009-0
DPD Free Chlorine Reagent Powder Packs 5 mL sample 1000/pkg 14077-28 RP009-3
DPD Free Chlorine Reagent Powder Packs 10 mL sample 100/pkg 21055-69 RP010-0
DPD Free Chlorine Reagent Powder Packs 10 mL sample 1000/pkg 21055-28 RP010-3
DPD Free Chlorine Reagent Powder Packs 25 mL sample 100/pkg 14070-99 RP011-0
DPD Free Chlorine Reagent Powder Packs 25 mL sample 1000/pkg 14070-28 RP011-3
DPD Total Chlorine Reagent Powder Packs 10 mL sample 100/pkg 21056-69 RP012-0
DPD Total Chlorine Reagent Powder Packs 10 mL sample 1000/pkg 21056-28 RP012-3
DPD Total Chlorine Reagent Powder Packs 25 mL sample 100/pkg 14064-99 RP013-0
DPD Total Chlorine Reagent Powder Packs 25 mL sample 1000/pkg 14064-28 RP013-3