I actually haven't been to a Beijing Starbucks, but in Shanghai, Hangzhou and Ningbo, Starbucks products are markedly more expensive. I imagine that for Beijing the same would be true. I suppose I shouldn't speak for China as a whole, as I haven't been to Starbucks all over the country.
They are probably the same price. I was just wondering if you were in Beijing. They have Starbucks almost everywhere now, even my wife's hometown in southern hunan.