When it comes to bleach, some go with scented, scentless, splashless or cold-water-specific. There may not be store-brand substitutes for those. But for those who grab a big old jug of basic laundry bleach, grab the cheaper one.
The active ingredient (either sodium hypochlorite or hydrogen peroxide) will be the same for both. The only potential difference is the concentration of that ingredient, but that won't make much difference to your dirty socks.
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