I have exactly what you are looking at but one size down.
I ride a M/L Defy and a Medium TCR.
Except my Defy is set up with no spacers under the stem and my TCR has about 20mm of spacers and the bars are still a bit lower than the Defy.
So put simply.
Take all the spacers out from under the stem of your Defy.
Ride it.
If you are comfortable with that position the TCR could work for you.