You didn't specify whether you were using an X3 or an X5. But I'll try to answer for both.
In general for digital cinema, a flat/logarithmic picture profile, combined with the proper grading (adding contrast and saturation) in post-production, produces the best final image. This is the case for cameras such as the Sony A7 series, the Panasonic GH4, the Canon cinema cameras, RED, Arri, etc.
But it has yet to be determined whether the DJI D-Log style is a true "log" style that produces superior image quality and dynamic range. I will point out that Panasonic finally released its log-mode color style for the popular GH4 more than a year after they released the camera. If it were an easy thing to produce, they would have had it at first release.
The fact that DJI had a log style at introduction of both the X3 and X5 makes me a bit suspicious. I often used the log style with the X3 camera, because it wasn't very flat or desaturated, and it was relatively easy to correct in Premiere Pro
I just shot my first log-mode footage with the X5, and the footage is much
more flat and desaturated than the X3 footage. I tried to correct it in Premiere Pro, with little success. I saw the other day that DJI had released its log-mode correction tool for the X5. I can't find it now, but I downloaded it, and it included a LUT in .cube format. I applied that, and the footage didn't look much better.
So for now, I am using the "None" color mode, with -1 on sharpness, saturation, and contrast, then tinkering with it myself in Premiere Pro.
So in short, log-mode + grading might be better than "None" mode, but only if you are really good at grading footage, which almost all of us are not.