Yep. This stuff doesn't really have a right or wrong answer. Many different techniques can produce the same results. what works for me may not for you.
I don't like DSB due to the fact that they can be great at producing hydrogen sulfide. Have you ever seen a DSB that looks like it is black towards the bottom? That is hydrogen sulfide. If the pocket gets disturbed, things can be nuked.
This is just an aesthetic con, but a DSB in a display tank can take away from visual space.
You may want to use the miracle mud. It may be awesome, but some will always disagree.
The methods i use are probably considered less than conventional. It works for me, but when I was initially setting my filter up, there were many nay-Sayers.
I also don't want to take the responsibility of telling you that one way is better than the other, because that is not true. Research the use of bio-available carbon in the aquarium. This will put a twist on the sand bed descision. Maybe you won't want any sand bed at all...