AD brings more income but takes more time showing in my experience. I switched to the BM showing SD for me because I just dont have the time to manually enter shows across all accounts for two to three hours three days a week
I either kept her training SD when I bought her, or when i saw she was strongest in MVT/INT/STR, I may have switched her to Dressage. Not really sure at this point which one it was, Storm. Probably something I did thinking she would earn more if she showed SD rather than AD...