I personally got Edision OS mini + , fabulous box with all the latest buzzwords @ same price !! One of my friend has mutant and i don't see any difference in picture quality at all. Finally it's your wish and money. But read following advantages
+ Points of OS mini plus
4 in 1 Remote - Great Range
Nand Flash: 512MB - Bit faster than mutant
Onboard Wifi + Bluetooth - No one can beat @ this price point
2 USB ports
Digital Combo receiver LINUX DVB-S2/T2/C - Unless you don't watch one programme and record another.
Let us know on what did you settle on...Best Luck