no, you won't have a better chance in ERC vs CSP. however, you will get an advantage for being rural so long as you sign up for the Dean's Rural List (make sure to do this). I highly highly recommend you don't put ERC first, because CSP is the "default" course with no obligations. you can always put a rural placement as one of your rotations as a CSP student if you want, it's just that you won't be obligated to do so.
if you put (for example) ERC -> CSP -> BMP, then you might have the scores to get a CSP offer but you'll get ERC instead since it's less competitive. you would only get the chance to go to a metropolitan placement in your last year of the course (for just a couple of months).
of course, if you are truly convinced that you won't want to do more than one metropolitan placement then you should preference ERC over CSP. however, the majority opinion is that a CSP place is "better" than a ERC, which is evidenced by the higher ATAR cutoffs.
source: am a med student
