A summary:
- The 360 version of DMC4 outsold the PS3 version for the UK, but at a slightly lower ratio than you would expect based on install base reported by VGChartz.
- We have charts showing the PS3 version outselling the 360 version for Germany, France, Spain, Italy, Sweden and the Netherlands. This just like any other cross platform PS3/360 game on these charts.
- There are indications the UK accounts for about 20-22% of the European PS3 market based on Sony statements regarding christmas sales and European PS2 install base.
I think these are clear indications that VGChartz was wrong, probably giving too much weight to UK sales.