You could look at it as the differences in Balintawak, there is the grouping system, which is very drill heavy, were people study premeditated actions and responses with a lot of structure, and there is the random method which focuses more on natural responses which feels more freestyle.
For my own experience, in De Campo 1-2-3 Original there aren't drills like sumbrada or siniwali. The system has no specific drills like the other systems. The techniques and principles are divided in 3 levels, Elementary, Highschool and College. There are no disarms only striking, and people always think it's purely a largo system which is a misconception. People that teach only largo in De Campo don't understand the art that well.
In Baraw Sugbo there is a bit more drilling there to develop responses and attributes. The art has 4 progressions. I'm not teaching this system so I wont go to deep into this one.
What ever way you are training the most important is, does the training method suits you, and that's why the diversity is a beautiful thing