Let us consider the scenario where two ASN's are announcing the same IP space however one has a summary route.
ASN 123: 126.96.36.199/17
ASN 234: 188.8.131.52/23
Will traffic prefer to go to ASN 234, as it is the most specific route? Also, would anything stop either ASN from using a redistributed static route to handle the traffic after it is inside of their ASN?