Congratulations on your admits! It is a good dilemma to have!
If MBB is dear to you, Kellogg will be a much better option for a few qualitative and quantitative reasons:
1. MBB's have presence at Kellogg and spend 4 days on campus; attend classes, conduct coffee chats, and are a permanent fixture. That is not the case with Anderson
2. On Campus hiring is slower on West coast. Programs are smaller and while nobody scoffs at Anderson, nobody wants to fly there for the sake of 360 students vs. Chicago that has both Kellogg's 479 and Booth's 580
3. Nemerically, Anderson sent 15% of their class into consulting while Kellogg sent 132 of 479
4. On Thursday there was a good discussion about M7 vs. Top 20 for Consulting:
https://gmatclub.com/forum/consulting-r ... 12877.html - I would recommend reviewing it
P.S. Is it possible to get into MBB from Anderson - anything is possible but chances and opportunities, esp for an international applicant will be significantly better at Kellogg.