Is spinach the same as pechay?

Spinach and pechay are both leafy green vegetables, but they are not the same. Spinach is a member of the Amaranthaceae family, while pechay is a member of the Brassicaceae family. Spinach has smooth, dark green leaves, while pechay has crinkly, light green leaves. Spinach has a slightly bitter taste, while pechay has a mild, slightly sweet taste. Spinach is typically eaten cooked, while pechay can be eaten cooked or raw.