Blockboard is a type of board made by wooden pieces inserted between ply of hardwood which bonded together under a high pressure and temperature. 

MDF gives a smooth and uniform surface wherever it is applied. It can be easily worked upon by carpenter and as it has small sized particles and fibers it can be cut into shapes very easily which gives the end product a smooth finish.  MDF does not have any grain and it can be finished by applying paint on it. If you want wood grain finishing then you would need to put a veneer or teak ply on the MDF board

To protect MDF the steps below should be taken.

• Make sure that the board does not  get in touch with water as it can damage it.
• Clean the board with a clean soft cloth to remove the dust. 
• Do not mop with damp cloth. 

• Carpenters find it easy to work with
• The board can be molded easily
• Medium density
• Less expensive than hardwood and solid wood.

• HDF comes with a smooth surface.
• HDF is High density board has more strength compared to MDF and Particle board
• Great solution for indoor and outdoor furniture, wall paneling,  furniture, room partitions, and doors. 

• Block boards are light in weight and comes with a high strength. 
• Easy to handle and work with. 
• Used for all site applications, furniture and door manufacturing with high utility. 

• MDF does not have good strength when compared to solid wood so make sure it is not used in applications where heavy load is expected to be borne by the board. 
• MDF boards also do not have very good holding strength for nails/screws. If a furniture piece needs to be moved frequently or dismantled and then rebuilt frequently then the MDF board might loose the grip on the nails.
 

HDF is the best board when compared with particle board and MDF. Still a lot of carpenters prefer wood block board compared to HDF as they are more confident about the nail holding capabilities of natural wood whose blocks are used to build the block board

Comparatively expensive.