Anton,
It all depends on your personal interest. I personally feel its all about how curious you would be to design from business reqs vis-a-vis code from detailed designs. Both the roles are supplementary and NOT mutually exclusive.
You would need to have some experience producing class diagrams, component diagrams etc for the exam. If you're a
J2EE Developer producing classes/frameworks from technical specs or tech specs from business reqs,
you should opt for scea exam. Part1 is generic and a focussed study for few months will see you through.
Thanks
Sankha Subhra Das