The cooling-induced order-order transition-based thermogelation does not occur instantaneously. To follow both the gelation upon cooling and the order-order transition for the different pPheOzi-based copolymer variants, we performed time-dependent rheology measurements at 5 °C and obtained micro DSC (µDSC) thermograms of samples incubated at 2 °C for different lengths of time (0 min -24 hours) (Fig. , Sup. Fig. ). Of note, the different incubation temperatures were chosen to ensure comparability with previous reports. At 20 wt.-%, the triblock copolymer P_T gels within one hour (Fig. ). Furthermore, P_T displays a most prominent peak at around 32 °C in the µDSC thermograms (Fig. ), which coincidences with the gel-sol transition and which we previously assigned to the worm-to-sphere transition. Upon increasing the incubation time at 2 °C, the peak maximum and area increase, indicating progression or maturation of the worm-formation. Compared to P_T, the gelation of the diblock P_D is delayed (Fig. ), as is the evolution of the main peak in the µDSC thermograms (Fig. ). Additionally, the maximum of the main peak shifts from 29 °C to 35 °C with increasing incubation time at 2 °C. For the gradient and the star-like copolymer, the retardation of the gelling process is even more pronounced (Fig. ). Thus, both polymers show no signs of gelation within 3 hours at 5 °C and display a delayed peak evolution in the µDSC thermograms (Fig. ), i.e., a retarded worm-like aggregate formation. In addition, the maximum of the peak in the µDSC thermograms of P_G and P_S is found below 30 °C, indicating a lower temperature barrier for the dissolution of the worm-like aggregates compared to P_T and P_D. This is consistent with P_G and P_S gels also showing lower persistence against temperature. Compared to the triblock, the diblock P_D is expected to result in micellar structures with both larger core and shell, thus affecting the resulting packing parameter. This, in turn, seems to impede a fast and efficient sphere-to-worm transition and thus thermogelation. P_S was included in this study due to its higher degree of preorganization. In particular, we hypothesized that the worm-formation is facilitated for the stararchitecture and may be realized by simple stacking of the polymers. However, our data clearly refute this assumption. This may be due to a more compact core, i.e., micelles with a smaller hydrophobic volume fraction, favouring spherical micelles.