The bigger of the two has a resolution of 2560 by 1440. Both have four USB 3.0 ports and two Thunderbolt, 32GB of RAM, and as much as 768GB of flash storage. There's also an SD card, gigabit ethernet, and a fusion drive, which is 128GB of flash storage plus 1 or 3 TB of hard drive combined into one hard drive. And they're skinny enough that they'll fit nicely under that Douglas fir. More here.