Hi,
Main difference is ICE v2 has support CPSW ethernet ports as well as PRU MII ethernet ports (muxed)
NOR flash address space access up to 512KB (128KB of ICE v1) without using additional GPIOs.
There are some changes LED usage (reduced)
Address selector based on rotary switch and passive matrix LCD support added
Unlike ICE v1, ICE v2 can directly boot from Micro SD card
USB connector used for serial console and JTAG is changed to micro (from mini) type
Changes in certain SPI peripherals (chipselect and SPI instance) connection to AM335x
For details refer to H/W userguide and schematics