Bigelow Aerospace has an article, showing the differences in the Genesis 1 and Genesis 2. Genesis 1 is currently orbiting the Earth and the Genesis 2 is set to be launched in April.
- Improvements on the materials used in the construction of the inflatable modules
- Upgrades in the control and sensory equipment (so better pictures?)
- Tripled data rates (with Alaska and Hawaii ground sites) with a comm window of 5 hours/day
- Increased communications results in better vision systems (so better pictures?) plus outside cameras showing a better view of the module in space
- Additional pressure, temperature, attitude control and radiation detection sensors
- Multi-tank inflation system
- More refined pointing control and a faster dampening of the initial tip-off rate or body rotation from rocket separation