Good postings all! http://www.ktgrinpoche.org/http://www.namsebangdzo.com/Ascertainin ... /10590.htm
Reading ACAV is ike eating marzipan - take small bites.https://www.youtube.com/watch?v=j9Vr_iPEviQhttps://www.amazon.com/s/ref=nb_sb_noss ... d+dzogchen
My 2 cents.
It's complicated. The views are explained in written and spoken words above, and this is one thing. Taking transmission from an actual living lineage Master is something else. In the state beyond words, there is nothing to be said (or even can be said) so all questions of same or different are resolved.
Yet, there seems to be a subtle "flavor" difference in the transmission from each Master. This is a felt, or sensed, difference; not a difference of understanding or view.
The complication comes from the fact that most Masters of each tradition have taken transmission from the other, and so in their "flavor" of Dzogchen or Mahamudra, the flavors are integrated. That said, perhaps a lineage Master can give the transmission (flavor) as appropriate to each recipient.
So, perhaps it is like gelato (ice cream). Some people prefer plain vanilla and some (as I do) like "fruit of the woods." There are many flavors.http://www.italylogue.com/food-drink/it ... coded.html
It is up to you. If you want to understand the differences in words then study the words. If you want to experience the different flavors, then take transmission from different lineages.