Btw. also notice how the harmonics seem to look thicker at 96Hz the lower the frequency… Maybe just a coincidence, but maybe not… The view at 96kHz feels more helpful, only not below said 43,50Hz.
Doubling the sample rate while keeping the block size, should have a similar effect to halving the block size at the same sampling rate. So unless Renoise compensates in some way, if you compare 16384@96khz with 8192@48khz, it should result in a similar spectrum analyzer resolution.