I have IVF grand twins two and there are a marvelous addition to our family. Congratulations, Grandma! Now to your question. These two babies are two unique persons so you do not need to make the same quilt for each. You can have freedom to make same pattern/different colors or two completely different patterns. I know you have fabric picked out but consider non gender colors such as soft yellows, greens, salmon, turquoise and dare I say ...gray. I just purchased a layer cake from MSQC (Timeless Treasures, - Little Star) that features the most charming little bunnies getting sleepy under the stars. The colors are soft yellow, gray, white and too cute for words and on sale. Enjoy the wait, the anticipation and making special your special "grand lambs" quilts.