OK, now that I know what your goal is, here are some comments:
A portable dance floor needs to have the individual sections lock together to avoid separation or movement and potentially resulting in injury and lawsuits. The outside perimeter needs to have a beveled edge to avoid tripping.
Something like the tabled lap joint would probably work best. This type of joint can easily be done on a table saw with an adjustable dado blade. The corner pieces and outside perimeter pieces will have 2 or 3 sides jointed, respectfully. The center of the field will have to have oriented splices on all four sides. The panels should be numbered for easy assembly.
As far as the material to use. MDF will glue up OK for vinyl, but since there will be thin edges at the splices, it could be very prone to corner and edge chipping if assembled/disassembled often. I might recommend an A/C marine grade plywood. It is very stable, strong and uses a moisture resistant adhesive between the plies. Vinyl will adhere well on the A side. It also will hold up well to moisture and spills. There will not be a substantial difference in weight.
Although this would not be a difficult project, some experience using a table saw with a dado on larger pieces would be helpful. Proper support for the stock while doing these cuts is important. The plywood stock needs to be flat and supported at all times for the dado cuts to be accurate, avoid kickbacks and assure your safety. Good Luck.