There is no conflict, just people who don't pay attention to the fine print...
The service manual states:
Valve clearance - inspect
US, CA Model Every 15000 mile
Other than US, CA Model Every 42000 km (26000 mile)
CA is Canadian model, not California as many people are used to reading that abbreviation.
There were a lot of question about that difference between the US and Canadian model valve inspection interval and the rest of the world. The only significant difference I found is that US and CA models have an open loop FI (they do not have an oxygen sensor) vs. the European market bikes that have a closed loop FI and can adjust the fueling based on the combustion products.
In reality, almost every Versys that was inspected at 15K miles had tight valves (mine had 4 that were at the bottom of the spec and 4 more that were close that that limit), so doing the inspection at 15K miles is really recommended even on Euro spec bikes. Some people say they would do it even sooner than that.
Given that there are no differences between the '07-'09 engines and the '10 and later ones, any differences in recommendations may be from a change in their policy, but not from mechanical differences. Don't skip the valve inspection at 15K.