Is there any advantage to buying B/W over B2/W2 for shiny hunting?

Question

I've been considering buying Black 2 for my DS for shiny hunting, and I wondering if there's any content that B/W have over B2/W2 that could sway my decision.

Comments

B2/W2 has the Shiny Charm and multiple Pokémon guaranteed to be shiny, while B/W has neither.

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It's slightly easier to RNG manipulate in BW if you want to shiny hunt that way. Otherwise, BW2 has the Shiny Charm and several guaranteed shinies.