Do tell us women about the "significant difference." Most abortions happen when the embryo is at the stage of development that most miscarriages occur at so on the one hand you have Nature, (or in the minds of the credulous--God the Father, Jesus Christ and whoever else occupies the Christian pantheon), who eliminates the embryos chance to be born and on the other women making a conscious and legally protected (Roe v. Wade, 2nd Amendment) decision surrounding their bodies. 
The difference which you claim is "significant" really isn't in terms of the clump of cells you call an unborn child. The clump of cells can't exist without the woman to whom it belongs. What is significant, though, and you seem to conveniently forget, is the free will of women to make decisions about their bodies. Guys like you and Trump think you can grab women and make them do what you want but women know that "happiness is a warm gun (bang bang shoot shoot)."