Unit 3/4 Economic

Hi everyone, I'm planning to switch from Unit 3/4 PE to Unit 3/4 Economics next year. What are your thoughts on this? Is Economic hard like subjects like Physic or Chemistry since it scales around the same as Physic? What scores should I aim for to get a high 40s on SACS and exams? Any other information I should consider? Please share, I really appreciate it. Thank you!