What is the difference in actual sleeve length between the two shirts? It looks to me like the shirt you're wearing is a touch too long: especially seen in the unbuttoned picture and in the subsequent one showing the bunching up. I think if it was shorter by 1/4 inch, when buttoned (it probably would need to be even shorter in the unbuttoned state) it would be good. The jacket sleeves look pretty spot on to me.
Thank you for the input. The BR Regular shirt sleeves are 34" and the Tall are 35.5". Here are pics wearing a BR Regular shirt. The sleeves sit just about flush with the jacket sleeves.