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I know what you mean, the sensitivity around the zero mark is a bit tricky.
The DDJ-RX didn't have labels on the channel meters, so it's a bit hard to compare them simply by looking at the surface, but here's what I can tell you about the DDJ-1000...

Between the last green LED and the first orange LED is a difference of 6dB... that's a pretty big range. Unfortunately these meters are more for the "general use" population and not intended to be used for beatmatching. And because the numbers are screened onto the unit, there is no likelihood that the reported values will change.
Thanks for your feedback.