It's probably a gross oversimplification to compare casualties... but here goes.
U.S. Military deaths to hostile action during Operation Iraqi Freedom (thru April 30, 2003) = 109
U.S. Military deaths to hostile action during Desert Storm (January 16, 1990 to Sept 14, 1991) = 147 (total coalition deaths = 378).
I'll come clean and state right out that I'm not real certain of the coalition figure. I searched for numbers and landed on Wikipedia. The U.S. figures are good, however.