There's a bit of comparison of the two (thermal vs. non-thermal escape) here: ht...

There's a bit of comparison of the two (thermal vs. non-thermal escape) here: https://en.wikipedia.org/wiki/Atmospheric_escape#Thermal_esc... but I don't know the relative proportions on Mars. There have been some recent studies of the xenon isotopic composition of the paleo-Martian atmosphere that might provide a bit more insight, and in particular suggest most of the loss happened early: https://www.sciencedirect.com/science/article/pii/S0012821X1...