Thank you all for your reply!
you right say that Maxwell has better light accuracy; we only try to reach it with Blender Cycles.
the purple hue you see is made from different post, not for an issue.
for bump question, you are right, we use less in the Cycles scene, also because it seemed too much in the Maxwell scene…
for light question, we noticed that we have different shadows, probably because in the Maxwell scene we use a Daylight + sky-portal, instead in the Cycles scene we only use an emitter plane. We tried to use a Sun light in Cycles scene, but we don’t reach a result that satisfies us.
In addiction, we post the original Cycles render (without post-production) or other correction on the scene (in the first render we done some UV’s correction and some model correction - look at the papers on left-down corner)