Here we are comparing two cameras with different body types: Pentax WG-3 GPS, which was introduced in July 2013 is a Waterproof camera with a 16.0MP 1/2.3" sensor whereas Fujifilm X-T100, which was introduced in May 2018 is a Entry-Level Mirrorless camera with a 24.0MP APS-C sensor.
Comparing an interchangeble lens camera to a fixed lens camera is a bit tricky but we will do our best to make this a fair comparison. Fortunately, you can't go wrong with any of these cameras as we rank them amongst Top 10 cameras in their classes. Pentax WG-3 GPS is ranked #9
out of 73 Waterproof cameras with an overall score of 54 whereas Fujifilm X-T100 is ranked #5
out of 100 Entry-Level Mirrorless cameras with an overall score of 77.
Let's have a brief look at the main features of Pentax WG-3 GPS and Fujifilm X-T100 before getting into our more detailed comparison.