hi there. just my small input. I have a 12m old 117lbs Boerboel male that comes into my shop. They got him from www.powerboerboels.com (New Jersey, USA) they do not care about comformation. They focus on STRENGTH, INTELLIGENCE, COURAGE, AND LOYALTY. This guy is a big LUG. Very attentive but very sweet and loving. The foundation Male was imported from South America and their main Bitch is from Proffers kennel here is USA. As for Presa...I do not know that much about them but just wanted to share the info on the Boerboel. have a good day!