Using solid-state NMR, it was recently reported that the hydrophilic corona is also significantly involved in the drug/polymer interactions in POx/POzi micelles, in particular at higher drug loadings, which impeded dissolution of the lyophilized polymer micelle powders, which can be understood as a unusual solid amorphous dispersions. Moreover, using fluorescence spectroscopy and lifetime measurements, significant differences for the molecular environment of the incorporated drug were found at very low drug loading where no involvement of the hydrophilic corona is expected. Inspired by this, we set out to determine if the involvement of the hydrophilic corona in this formulation and distinct polymer-drug specificities observed for POx and POzi based CUR formulations also result in different micellar morphologies or sizes. The analytical techniques utilized so far were not able to address these questions.