One more comment - theory tests are often used in US conservatory/college auditions for placement only - not admission purposes. Or, if considered for admission, not weighted nearly as highly as the audition playing. In fact, not all conservatories/colleges have a theory exam component to the admissions process. For those that do, if you have passed RCM level 9, you will most likely do fine on US theory entrance exams. (Theory teaching is not standardized in the US - some kids have no formal instruction at all before college years.) You might want to spend more time on your violin and skip the theory grade 10 exam. US conservatories will not care if you have passed all or any levels of RCM Theory - they will only know about the results of their individual theory test.