I do not want to start any flamewar here. But since I own both Sony A7 FF camera and Fujifilm X-E1 + X-A1 cameras I can compare them easily.
Sadly for a landscape photography Fujifilm does not come close to A7. First X-trans is not the best thing for Ligtroom + foliage, second it might be just me but I prefer more realistic look of Sony files. Fujifilm files are well a little bit too dreamy for my taste. Anyway I bought none X-Trans X-A1 camera and yes foliage looks better than from X-E1.
I have one major problem with Sony generally. Colors and auto white balance is really really bad. So if you do not want to loose your time with tweaking colors, white balance -> go a Fujifilm way.
Hopefully it can help you.
Cheers
