I dont think that it will work. Maybe if your Thanaz are huge in the waist/hip and comfy in the thighs, but even then I dont think it will work out well. I dont think that MIIs stretch sooo much more than MIJs but dont quote me on that one as I have never owned any MII raws.
The MII cut is a bit different though and the legs are rather straight from the knee down but the upper block is NOT more relaxed, only with smaller backpockets and a lower rise. So if your Thanaz are fitted in the thighs in a size 28 you will probarbly get a problem with the MII raw fitting your thighs in the size 27.