I use both Olympus and Fuji systems. I used more Fuji X cameras and currently have the X-E3, X-T10. The X-E3 is the upgrade for my X-T10. It's fun to use. The Olympus Pen F I bought right along side this Fuji has the 17mm and 45mm MFT lenses. Both use WiFi to upload shots to phone. but the X-E3 has bluetooth too. Neither is weather sealed. The X-E3 feels lighter, and the Pen F is retro, more so than the X-E3.
X-E3 has APS-C and renders beautiful shots with a lot of dynamic range. The Olympus Pen F micro four thirds has less dynamic range and it is noticeable, but the Oly seems to get better distant details; more so than the Fuji from what I can see. Both render pictures differently, and both are great. The Olympus sharpness and detailed shots make up for the little bit less dynamic range. The Fuji LCD is easier to deal with. The Oly LCD is kind of annoying, but I found a YouTube video to make it less light reactive. The EVF on both are similar, but the one on the Oly fatigues me a little more.
I love both cameras. Both produce outstanding poster size prints that you wouldn't be able to tell the difference. Both are fun to upload jpegs, even though the Oly is slower at doing so. The Olympus came out in 2016. Not sure when the X-E3 came out. I quite frankly do not care about either as you can pick up NEW bodies from B&H Photo or similar. The Fuji will take larger lenses to accommodate that APS-C sensor and lens mount. The lenses are a tad smaller on the Olympus, especially the ones I bought, but you could certainly add a 12-100 and hold the lens so the Pen F doesn't get too front heavy. The Fuji X-E3 has that same front heaviness if you add a longer lens. Doesn't matter. Don't care. I only carry smaller cameras now.
The amount of pixels in the Olympus is plenty enough and the Fuji just adds even more. Both print great. Both the acres and the Mono 2 settings on both cameras are a joy to use. I shoot RAW, but now as I get older, I use JPEG for posting on social media as it comes out of the camera. The RAW is for a later date for photo editing if I find one shot that I'd like to print big. Both Fuji and olympus produce lovely images, different for the above reasons. Which is more important to you? I say get both. Photographers usually have a ton of different brands for different client shoots. Or maybe you just like different "painting brushes".
I have used every brand since 1970. I've used 35mm up to view cameras. I've used both film and digital cameras. I've tried and owned them all. To me, the most important thing is: Do you like the ergonomics? if it doesn't feel good in the hand and make you want to shoot, don't bother buying it. Or, rent it and try it out first.
