My short answer is I prefer the internal awareness. All day external awareness just feels like a bunch of flat reality checks. But if I sporadically, throughout the day, practice an "internal awareness" check, then I can almost feel like I do that moment I realize I'm dreaming in a DILD. Hard to explain, but that way is more effective for me than maintaining an awareness of my 5 senses all day long.

Hope that answered your questions.