You're Under Arrest, Infinite Ryvius

I had 3 CDs arrive from Japan yesterday which is unusual. One was my Gunbuster CD which came by DHL. Two others came by mail. I haven’t had time to listen to them yet.  I’m wondering if my You’re Under Arrest Original Soundtrack is the same as You’re Under Arrest 1 1/2?  They both seem to have the same tracks. Both CDs pictured were purchased used but in good condition.