The ADF4107 has better normalized noise floor spec than the ADF4007, but worse plot results.
Normalized Noise Floor
-100dBc/Hz (Fig.4) -85dBc/Hz (Fig.11)
Figure 4 in the ADF4007 isn't an accurate way to measure phase noise.
I recommend using ADIsimPLL to simulate the phase noise of the ADF4007 and ADF4107 for your application. Note the ADF4007 has limited divider options.
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