Except as otherwise provided in subsection (b), a security interest created by a debtor is subordinate to a security interest in the same collateral created by another person if: The debtor acquired the collateral subject to the security interest created by the other person; The security interest created by the other person was perfected when the debtor acquired the collateral; and There is no period thereafter when the security interest is unperfected. Subsection (a) subordinates a security interest only if the security interest: Otherwise would have priority solely under § 9-322(a) or § 9-324; or Arose solely under § 2-711(3) or § 2A-508(5) of this article.