Thanks for the information Bonnie and sheperdlass.   This cassette must have been was a bit more professionally produced by Thomsun claiming 'Computer mastering', with printed cover (but no writer credits).    O' Donnell's stuff was on Digital CD so the quality is fine - and it does seem that they put some thought into the programming and order of the tracks - as they could have just chosen any old material, but it fits together in a cohesive way. They avoided many of O' Donnell's most obvious songs included on the official 'Very Best of Album', it has a running time of 90 Minutes.

Many Rock acts also had their material 'pirated' by the company under the title 'Thomsun originals'.   You won't find any of these special compialtions included in any discographies!