? RN Clinical Assistant 2

Does anyone know what an RN clinical assistant 2 is vs. a 1? I am applying for jobs, and I know this is an MD office triage job with other duties. But they are looking for two people, and one job is for an RN clinical assistant, and the other for an RN clinical assistant 2. Not sure........thoughts or info appreciated!
Job titles are specific to the employer. A "2" of anything is likely to have more advanced responsibilities than a "1". Other than that it's impossible to generalize.

Ok, that makes sense. It's sort of what I thought. Like EMT 1,2,3.....I think I might be overqualified for this job since it asks for 6 months experience as an RN. I have five years, so while not truly seasoned, I do have wet feet!