I haven't tried Freetronics yet, although I've been tempted by Etherten and I have the same problem as you. I can only get it in the mail.
As for your question...
I don't normally like buying something that tries to be like something else, and says it is better without stating why.
I got this from the website:
As well as the standard Arduino Uno features found here, the Eleven has the following improvements and updates:
For those projects where you don't need the extra size or expense of a shield, the Eleven has its own standard prototyping area taking up a quarter of the board. Great for quick sensor and IC projects. There's extra power pads underneath for neat connections.
LEDs visible on the edge
Wondered what your Arduino was doing? We've carefully placed a nice blue Power LED, plus colour coded RX, TX and D13 LEDs on the right edge of the board so you can see what's going on.
We've provided proper crystals for both the primary MCU and the communications MCU, rather than using a ceramic resonator.
No more short circuits of the large USB connector against your shields. Our standard Mini-USB connector is firmly mounted and we've included a cable too.
Overlay guide where you need it
When you're soldering your project, it's good to know what you're connecting to! All of our boards and shields have a thorough pinout and guide printed on the bottom as well as the top, so when you're soldering underneath there's no need to flip the board over constantly.
Top spec MCU
Every Eleven has the higher specification ATmega328P Microcontroller.
D13 pin works for everything
The digital I/O pin 13 functionality has been fixed, the D13 indicator LED no longer loads up this pin when you use it as an input.
Mounting holes and power jack
We've included a fourth mounting hole in the bottom left, there's no more wobbly board troubles if you're fitting it to a case.
Helpful markings for the Power Jack size, polarity and voltage are right there on the board when you need them. Auto-power switching and self-resetting fuse protection are standard.
It's all in the same place
The power jack, headers and ICSP are all in exactly the same location as Arduino standard boards. The Eleven is perfectly compatible with all Arduino shields, projects and sketches.
I agree with all this except the point where the Arduino doesn't use the ATmega328p.