Occurrence of ice particles in the summer mesopause region is an intriguing phenomenon that can be observed either optically as Noctilucent Clouds (NLC) / Polar Mesospheric Clouds (PMC) or by radar as (Polar) Mesosphere Summer Echoes ((P)MSE). These observations are directly related with distinct atmospheric properties like temperature, humidity, winds, turbulence, and electron density. A question especially at mid-latitudes is whether the ice clouds are formed locally or whether they are advected from polar latitudes. Such an investigation provides additional insight into an atmospheric region, where long-term records are sparse. The simultaneous observation of small and large ice particles requires the combination of radar and daylight-capable lidar techniques, which is typically not available at mid-latitudes. Since 2010 we operate a daylight capable RMR lidar at our site at Kühlungsborn/Germany (54°N, 12°E) for optical observations of NLC during night and day, i.e. independent from solar elevation. In combination with the co-located OSWIN radar we are able to compare the occurrence and altitude structure of NLC and MSE at mid-latitudes for the first time. We will present examples and statistical averages of the altitude coverage of both phenomena. The lower edges of simultaneously observed NLC and MSE typically agree, as expected from observations by the ALOMAR RMR lidar at polar latitudes. The top edge of MSE is on average observed nearly 500 m above the NLC edge, indicating the presence of ice particles being too small to be observed by lidar. Surprisingly, this height difference is much smaller than observed at polar latitudes. This hints at different size distributions of mid and high latitude ice clouds and, by this, different growing conditions. The data suggest that advection from polar latitudes plays a larger role for ice cloud occurrence at our site, compared to local formation in the cold mesopause region. This is supported by, e.g., wind measurements showing a higher probability for ice occurrence during northerly winds. Therefore, our data indicate that mid-latitude NLC do not only depict local mesospheric conditions, but mirror also high-latitude conditions, which is important for, e.g., evaluation of NLC in climate research.