In between sizes for Endurace Allroad

Hi everybody,

I am buying a new Canyon Endurace Allroad but have a difficulty to choose the size of the bike. Based on their provided metrix I am just on the border of M and L, but just drop in the M size. I am 185,5cm high and have 83,5 inner leg length. Since I can't try the Canyon bike in my country I tested a Specialized Diverge E5 and a size 56 fit me perfectly. So, what would you recommend?

I read that it is usually better to size down. But since I want a more relaxed position would it still be better to choose the larger size? Since smaller means more aggressive if I understand correctly?

Thank you for your help!