I am currently play-testing an Awakened Mystic character in D&D 5e, using the beta rules released by WotC. As such, I have an ability that lets me choose between having Blindsight or Tremorsense.
BLINDSIGHT: ...[B]lindsight can perceive its surroundings without relying on sight, within a specific radius.... (Monster Manual p.8)
TREMORSENSE: ...[T]remorsense can detect and pinpoint the origin of vibrations within a specific radius, provided that the [observer] and the source of the vibrations are in contact with the same ground or substance. Tremorsense can't be used to detect flying or incorporeal creatures.... (Monster Manual p.9)
I have been wondering what the difference is between these two, aside from the fact that Tremorsense requires contact with the ground and cannot detect flying or incorporeal creatures. Specifically, I want to know whether Blindsight cannot detect creatures through solid matter such as walls, floors, and ceilings, whereas Tremorsense can? Can Blindsight detect creatures on the other side of a dungeon wall, or on another floor of said dungeon? Are there monsters in 5th Edition that possess both Blindsight and Tremorsense, and if so, when and why would they use one as opposed to the other?
I am aware of and appreciate this question regarding Blingsight's capability to detect invisible creatures, but it doesn't exactly address my issue of whether solid matter effectively "blocks" Blindsight.
I will gladly consider either rules-as-written or rules-as-interpreted answers. If there is a published game mechanic or a posted developer ruling I have overlooked, please include and cite them in your answer.