MSL should be able to sniff the breeze for methane and test rocks for organics.

ExoMars will be able to drill two metres down as well.

What is more disapointing is that the two Scout proposals that could detect methane, Great Escape and MOO, lost out to MAVEN, which cannot. It probably illustrates the lack of seriousness with which previous reports of Marsd methane from the Mars Express and Keck teams were taken.

Jon