Neoprene suits are generally thicker in the chest and leg panels - thinner in panels that cover body parts where there is more movement. Here is a chart to give you an idea of the temperatures that Jet Pilot Wetsuits work best in. Glued and Blindstitched 50-65 degrees Dry suits can keep you comfortable in frigid temps, but for wakeboarders, it's still a challenge to keep your feet warm. Hardcore riders who like bonking icebergs would benefit from a suit like this but you might have more fun snowboarding or kiteboarding on the snow instead when it gets that cold. This comes to another consideration when buying a suit - fit.
Some companies make suits specifically for certain body types.
You may see tall and short sizes generally for the higher end products. Some companies choose to limit the sizes they offer but use materials that stretch easier to accommodate different body sizes. Ultrastretch, Megastretch, Flex Lite, Superstretch are all buzzwords to describe a type of neoprene that has incredible form fitting properties. Suits with this type of material are generally a little more expensive but are worth it when you consider fit and flexibility. And for those people who thought that short sleeves are more comfortable than long sleeve, these super flexible suits may alter their opinion.