Does the BMC have a carbon steerer tube? If yes, you will face a limit to what you can do for height increase. If you look at the pictures of differenct BMC builds on CC, some start with 30mm stack, others 10mm. I would make sure you know what it is going to be cut to before you start.

To make the two overlap, nothing says that you couldn't swap in a 17° stem, or even short reach bars to pull the length in. How much do you want to do to get to this? BMC also has a steeper HTA, so as you go playing with raised and shortened hand position, it will most likely handle differently than intended. How will that compare to the C'Dale?

If all you want is the fit to match (hands, bottom, and feet in same spots), you probably can. If you want the rides to be identical, I would say it is less likely.

And from personal experience with an SL02 (same frame but 105), they fit much longer than the numbers say. I owned one for 30 days (thanks CC!) and I could not make it short enough.