Tech Tree costs, build costs, buy costs, racial differences? anything?
From DL to DA, Impulse Drive is increased in cost from 100 to 400. From DA to TA, both Impulse Drive II and Impulse Drive III are increased from 200 and 300 respectively to 400. Nano Recorders, unlocked from Sensors III, is reduced in cost from 540 in DL/DA to 100 in TA. From DL to DA, Xeno Entertainment is reduced from 500 to 300, Extreme Entertainment is increased from 1000 to 1200, Zero G Sports Arenas is increased from 2500 to 3500, and Virtual Reality Centers are increased from 4500 to 5500.
From DA to TA, weapons trees are decreased from 49k beam, nearly 76k missile, and 67k mass driver to max them, to sub-25k for everything in every tree and in some cases as low as 17k. TA 2.x introduces a mechanism that increases the actual cost of weapons (and defense) techs by 50%, which brings this number to sub-35k effective and as low as 25k effective.
Probably irrelevant for you, as I expect you're already on DA, but engine sizes and costs increase from DL to DA as follows:
-HyperDrive: 6+10% to 9+20%, 5 to 30
-HyperDrive Plus: 5+10% to 8+17%, 6 to
-Ion Drive: 4+9% to 6+14%, 7 to 20
-Impulse Drive: 7+8% to 10+24%, 8 to 50
-Impulse Drive II: 5+7% to 8+22%, 9 to 50
-Impulse Drive III: 4+6% to 6+18%, 12 to 50
-Warp Drive: 6+6% to 9+24%, 15 to 80
-Warp Drive II: 5+6% to 7+22%, 17 to 80
-Warp Drive III: 4+6% to 6+20%, 18 to 80
-Warp Drive IV: 3+6% to 5+18%, 18 to 80
-Warp Drive V: 4+6% to 8+23%, 10 to 100
-Hyperwarp: 3+5% to 6+20%, 10 to 100
-Hyperwarp II: 4+5% to 5+16%, 10 to 120
-Hyperwarp III: 5+5% to 5+18%, 10 to 140
Focus is reduced in TA to 80% of its former output-that is, 20% of focus is transferred, but 25% is still lost.
-
There are plenty of other changes, but without knowing what version you're on and what version you're going to it's difficult to give you relevant information, as is noted above.
