Exam 6 is a lot of studying and there is already a chance we wont have as much time to study this sitting.  And yes I would say online course 2 is a little bit harder than 1.  All that taken into consideration I would go with option B personally.  I took a month to study for OC2.  After taking this spring sitting you should have 8 weeks which leaves time to fit that course in somewhere instead of last minute ordering stuff now.