There is no suit that suits everyone or considered to be the best one. Every diving wet suit has its uniqueness and advantages and the choice of the customer depends on his or hers comfort and needs.

Hood - There is a hood that is connected to the suit and there is a seperated suit. 

Neoprene:

Various Thicknesses:

2/3, 3, 5, 5.5, 7, 8 mm.

Various Types:

Open Cell - Internally it is almost completely sealed against water coming in.

Extend - extremly flexible fabric.

Thermospan - internally it is very soft and smooth to the skin.

The differences between the suits:

Two parts wet suit - including lower part- long john and upper part- a jacket.
There are jackets with or without a zipper.
During the summer or in warm water only one part of the suit can be used.

One part- Overall wet suit
The zipper can be located in front or at the back of the suit

Shortie - short sleeves and short trousers- for summer diving or for warm water environments