The X-T100 is an entry-level model in the Fujifilm X-Series. It features a 24.2MP APS-C sensor with a standard Bayer array, a hybrid autofocus system and 4K video recording up 15fps. It was the first entry-level product from Fujifilm to feature a built-in electronic viewfinder and a 3-way articulating screen for vlogging.
The Fujifilm X-T20 is one of the most popular mid-range models in the X-Series. It features a 24MP APS-C sensor with an X-Trans III array, a reliable hybrid autofocus system with C-AF custom settings to fine-tune the performance and 4K video recording at 30fps.
The Panasonic Lumix DMC GX9 is a mid-range micro four thirds interchangeable lens camera. Officially announced as the GX8 successor, its appearance and features put it more in direct competition with the Lumix GX85.
The Fujifilm X-T2 is one of the most popular models in the X-Series. It features a 24MP APS-C sensor with an X-Trans III array and is the first Fuji model to introduce 4K video recording. Its hybrid autofocus system is among the most reliable in the mirrorless segment. It shares many characteristics with the X-Pro, X-H1 and other cameras in the series. It has received a considerable number of firmware updates, some of them adding relevant settings such as internal F-Log and 120fps slow motion video. A Graphite Silver version is also available.
The Sony A7 III is a full frame mirrorless camera with a 24MP BSI sensor, fast autofocus system with 693 phase detection points (the same as the flagship A9), 10fps continuous shooting capabilities, 4K video and many other things. It is part of the third generation of A7 cameras in the E-mount series and is the prosumer model. It shares the same design as the A9 and A7R III (AF Joystick, Dual SD card, Larger battery, etc.) but comes at a more attractive price.