Short session, way too broad and not enough wind, just a single fast run. However, compared GPSLogIt (Samsung Galaxy S5), GT31, and GW52 (5Hz).This time the live transmission of the last 10s runs from GPSLogIt worked perfectly (last time in Buesum there was no internet connection / service available).

             S5        GT31               GW52
Max     36.564  36.214+-0.428  36.194+-1.225
10s      35.593  35.591+-0.458  35.372+-0.331
5x10s   29.683  29.658             29.717 
500m    33.668  33.702+-0.473  33.625+-0.199

Due to the higher bandwidth of the GW52 the single trackpoint errors are larger [by a factor of sqrt(5)=2.23], instead of the averaged errors Gaussian error propagation is used for theG W52.