Here is a comparison between two brown shimmers: OPI Wooden Shoe Like to Know and Barielle Cashmere or Loose Me. Click the names for my previous swatches.
Barielle Cashmere or Loose Me is a lighter creamier brown with more hidden gold shimmer. OPI Wooden Shoe Like to Know is a chocolate purpley brown with more obvious pink and gold shimmer. They aren't dupes, but are definitely similar.