I am not fully clued up on the fitting of a LVT floor, however I would imagine even thought the LVT is more expensive to buy initially the installation would be much quicker and cheaper than an engineered wood, budget around £30 per m2 for fitting including labour, glues, trims etc.
When fitting an engineered wood floor, you can either float the floor (like you would a laminate) over a underlay (usually around 3 - 4mm thick) or you can glue direct to the chipboard which would give a much more solid feel very much like a solid wood floor.
If you are fitting the floor in a hallway I would recommend you have a coir mat well for a metre or so in order to trap and dirt and grit which would help stop any unnecessary scratches. - for example
http://media-cache-ak0.pinimg.com/736x/c3/cf/54/c3cf54bceba213eb3d92ae1e94de0f24.jpg