There are so many small details in these tools. Trying to think about all angles. ( pardon the pun) I just got an Infinity catalog and they have what seems to be the heaviest (non-deflecting) 10 inch blade, a full 1/8 inch with low hook angle. It might work to solve the curved cut problem I had trying to cut flat on the bed.
Not quite sure I get your comment. Are you suggesting that the small saw, with large crown, doing a compound cut flat does not give the accuracy, so you use the bigger 12 and cut only miter? Or is it as composite moldings, they can't lay flat? Support blocks etc.
I like to work alone, that way on one interrupts me with idle conversation other than myself.