Both Fujifilm XP30 and Fujifilm XP150 have 1/2.3-inch sized 14.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the XP30 and XP150 sensor size comparison.
Sensor Size and Resolution Comparison image of Fujifilm XP30 and Fujifilm XP150 Cameras
Fujifilm XP30 and Fujifilm XP150 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Fujifilm XP30 has 1% larger pixel area compared to Fujifilm XP150, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Fujifilm XP30
or the
Fujifilm XP150 ,
including hyperfocal distance.
