The ten years of schooling are in both cases general education, so they should be pretty comparable. Woodworking is something the German would learn during their apprenticeship and the American on the job (presumably).

How do companies who need skilled woodworkers in the US decide whom to hire? I'd guess they look for previous work experience. It's not clear to me whether an American who spent three years as an unskilled woodworker is any worse off in terms of job prospects than a German who spent three years as a woodworking apprentice.