Congressman Markwayne Mullin discussed the difference between alcohol and marijuana during a town hall meeting: http://www.tulsaworld.com/news/capitol_report/one-toke-over-the-line-says-congressman-markwayne-mullin/article_d4f2cdba-4a10-5961-a087-5df992e123d1.htm
You can definitely tell he has no experience with either alcohol or cannabis. I think anyone who has not tried cannabis should not be able to comment about it