First things first, there are two models of the F11:
FI-11-N1 (phosphor bronze)
FI-11 (copper)
I believe the copper model is more expensive. Phospher bronze is typically used in female IEC connections where you need a really strong metal. Male AC plugs don't really require phosphor bronze, so copper is a better element. Phospher bronze really isn't that bad.
I just went through some extensive re-listening and combinations with both Neotech and Furutech AC connectors. They both have their place. However, they are VERY different. The Neotech gold-plated OCC plugs are extremely fast and "push hard" when compared to the Furutech. I think they would be good with electronics that are very slow/warm and have a lot of decay (i.e. tube electronics or similar sounding). If you have a very messy sound, the Neotech will help clean it up. The Neotech do not have any decay. In a sense, it sounds like it's letting the wave form hit and them immediately stopping it without any ringing. They are very controlled and it may sometimes sound like the music was recorded with massive amounts of sound absorption in the room because you will hear no echo. This may be good for messy electronics or tube. However, on a very strong solid state system it will be too much and it will push the upper mids and highs way too much.
The Furutech plugs are more relaxed and natural sounding. If you pair these with messy/tube electronics, it can make the sound even more messy and you will lose any concept of "separation of instruments" (where you can pick out one instrument in the middle of an entire band). However, on strong solid state electronics it will sound more natural.
If you liked the Cu furutech that was attached to the cable before, I might suggest going with the gold-plated copper Furutech conectors or just the un-plated copper. In my experience, 220V will push harder on the power supply and you will get a harder "push" of voltage into the circuit. The gold-plated copper will help calm things down and sound more natural. Unplated copper Furutech is a little more stronger/aggressive than gold-plated and Rhodium-plated is the strongest/cleanest. That being said, un-plated Furutech will sound more relaxed/natural than gold-platted Netoech.
It's up to you -- it's a balancing act with your electronics. Furutech has an excellent description on the differences of their plating in the following URL (rhodium/gold/un-plated):