These crosses are funny. My one mare the Clyde cross is the most intelligent horse I have ever met. Whatever you teach her, it only have to teach her once and she will be good for life. I have haltered her and left her with my 5 year old nephew and she will be following him like a dog. I come back and he's been pretty much hanging off her ears and she just sits there waiting for him to finish.
Having said that when putting her into some situations where she really is not comfortable her brain shuts off and she just wants to go and will plow thru you if that means "she is safer". Unfortunately despite the endless hours I spend with her that draftyness in her kicks in and she turns into a donkey.
My canadian on the other hand, he is a sweet boy but he is a lot more hot than she is (not really comparable really because there is no hotness to her...) but when he spooks or gets anxious about something, he will rely on you for safety. A very sensitive horse who really pays attention to you and puts his full trust in you.
I'm pretty sure I have raised them the same, actually have had Calypso for a few months longer. It's hard to really say completely how they will turn out. Horses are horses and they have their horsenalities, you just have to make your best decision and go with your gut feeling.