In theory the soot level will be less from the low pressure EGR due to those gasses being taken after the diesel particulate filter (DPF) The unknown is the percentages of how many of the EGR gases are taken from the pre-DPF side or the post-DPF being as the gen-3 will still have some exhaust gases taken pre-DPF.
No matter how you slice it or dice it. Injecting exhaust gases into an intake manifold isn't going to be good for an engine long term.