I have this in one kitchen with a monogram oven below.

It really depends on what's selected. A Gaggenau oven below will not match very well.

What you need to be mindful of is the clearances needed for the reg oven before another appliance. The speed oven vents hot air from below and you don't want to suck that into the intake for your convection oven's cooling it's electronics. In the monogram's case, the space req. is around 2-3"

I have a GE Advantium Monogram and a Wolf - not a Miele but you can see that if you work with the appliance dealer to get the correct trims - it can work nicely.

Thank you, I hadn't even considered the venting issues. a2gemini, your ovens look great together! Do you like the Advantium? I was considering that one too, but love the idea of the Miele finish not catching fingerprints....