Hi,
Link below shows actual pixels view of the 7R image uprezzed to IQ180 resolution. I guess the resolution advantage of the IQ180 is obvious. There may be other aspects.
Is the difference worth 20 times the price? It is really up to buyer to decide.
Personally, I have no answer. I own neither camera and I will also not buy any of those. The IQ180 I simply cannot afford, the Alpha 7r seems to be a nice camera, but I am not so enthusiastic for non OLP-filtered cameras, and it does not really fit into my system and needs. I like the resolution, but I suspect the P45+ I have would still offer better resolution/acutance than the 7r. The area where I guess the 7r wins over my P45+ is shadow detail, and of course usability.
Best regards
Erik