Only four parts of T20 are even mechanically related to CT:
1) Prior Service. Very loosely.
2) Ship Design: HG, revised and expanded.
3) World and System "Design" - almost a straight lift from Bk6
4) Ships Economics - take Bk2 and add many options. It is better, in that most of the canonical designs now can make their payments by Double Occupancy of passengers, priority freight, security freight, and more spec cargoes available, thus allowing picking one that will be both sufficiently value dense and having sufficient mods to make carriage of ship-owned spec worth more than haulage of other's goods.
Of these, only #2 and #4 have any real ascertainable "improvements" and those are small.
1) Prior Service. Very loosely.
2) Ship Design: HG, revised and expanded.
3) World and System "Design" - almost a straight lift from Bk6
4) Ships Economics - take Bk2 and add many options. It is better, in that most of the canonical designs now can make their payments by Double Occupancy of passengers, priority freight, security freight, and more spec cargoes available, thus allowing picking one that will be both sufficiently value dense and having sufficient mods to make carriage of ship-owned spec worth more than haulage of other's goods.
Of these, only #2 and #4 have any real ascertainable "improvements" and those are small.