I've not seen a BMN PD170 DPF up close but I do know what the CEGA one looks like. Going from the parts listings and some photos of the BMN one I found online there do seem to be some differences.
The pipe for the pre-DPF pressure sensor connects in a different place, as so a couple of the temp / lambda sensors and the upper securing lug is in a different place. There may be other differences too.
