I've never used an X-E but I own & have used a Fuji X-E1.
It also has a 16mp APS-C sensor, maybe from the same family as the Leica's. And I own & often use a GX7, sometimes with the same Leitz/Leica/Zeiss M & LTM lenses as on the Fuji. The Fuji and the Panasonic yield somewhat
different results in many cases, but I wouldn't say one or the other is "better." At pixel level the GX7 is noisier at higher ISOs, but downsampled for screen viewing—or printed—this disappears. With the GX7, and other m43 cameras, you may want to watch your highlights more closely at base ISO…a clipped JPEG can indicate a clipped RAW.
For me the GX7 is by far the more enjoyable camera to use…but then I bought the Fuji to use with adapted lenses only and have never explored its native lens system. My favorite lenses with the Panasonic are the two original kit zooms—14–45 & 45–200mm—along with the 20/1.7 and Leica-branded 25/1.4.
-Dave-