@ricecream Oxford College, your chances should be okayish, but not weak. Emory, you are primarily considered weaker right now simply because the application volume is so much higher than Oxford. And now with the info. you have given, your position does not look as good as your brother’s. I would give Emory a shot, but if it is not a top choice school at all, you should try wherever else for ED1. You can maybe try Emory RD, but it will not be easy at all and you should apply to a range of schools for RD. Perhaps try schools that have a business program like Emory, and are known for great academics and good scores (like yours) but a) have less application volume than Emory and/or b) seem more SAT sensitive than Emory and have a score range that puts you squarely in the middle. You could possibly get into Emory, but I cannot say it is the best especially if Emory pulls 20-24k applications again.
As for Oxford: Do you actually enjoy learning, or are you really just trying to complete some requirements and then get shuttled into the business school (like how hardcore are you about business/finance?)? Be very honest with me. Because if the latter, you should not start at Oxford. I do not recommend going there if you are the more hardcore pre-business person who prefers to skip the liberal arts oriented courses because at Oxford, since course sections are generally much smaller, it may be more rigorous in many cases. So it helps to enjoy learning/the challenge to enjoy Oxford/complete requirements without frustration (they are starting to move toward capstone requirements for example which requires investment in academics beyond coursework) and perhaps a slightly dinged GPA. Bigger schools often offer options to be less engaged with your academics in areas you aren’t interested in. Idea, do not