Rootboy, it was the difference in viscosity. Much easier to spread and appeared to be thinner. The Panaracer came with a brush attached to the cap. Long strings of glue when removing the brush and difficult to spread. I put a pair of latex gloves on and use my finger with the Mastic One. Because of the ease of distribution of the glue and the ease of contolling the application, it went faster. I did a google on the best tubular tire glue and read a fairly detailed evaluation of the top 4 or so and the best bonds and performance was found to be the Mastic One and Conti.