Actually they both have some very nice features and other features I don't like.
Here's a list of MY likes of each
Anywhere map ATC likes
1. The vector vfr view is very nice shows restricted areas, terminal area with the altitudes, also the terrain view works great.
2. The gps has never failed to lock on without an antenna.
3. The approach plates (pocket plates) addition is great. georeferenced.
4. I like the fact that you see an airport symbol. Touch it and it gives you the airport info, freq's, alt etc.
Dislikes
1. update is sometimes a little tricky to download from the computer. The new quadra does not use direct hookup to computer, uses wifi which I understand can also be difficult.
2. screen could be brighter- difficult to see in direct sunlight
3. I've gone thru three batteries in about 2 years
4. shut down process is really drawn out. About 5-6 button pushes just to shut down.
5. sectional chart screen could be better
IFLY likes
1. 7" screen size is nice and looks good with sectional charts
2. very easy update process using a usb memory card. then transfer to IFLY plug in and download.
3. powers off and on immediately
4. Has a remote control which is nice.
IFLY dislikes- to be fair ifly is a new product and software is still being developed. many hoped for changes scheduled to arrive in August.
1. no internal backup battery
2. screen could be brighter - difficult to see in direct sunlight
3. uses tru course instead of mag course (due to change in August)
4. does not put spec. airspace alt limits on chart (due to change in august)
In summary if I could have only one I would choose the ATC anywhere map even thou it has a smaller screen, but I'm not sure I would choose the new Quadra which replaced it. I would have to try it out first.