Hi Kevin and welcome to the cave by the Creek.
Everyone has a different approach to their chisel acquisitions.
You mention this is your first set instead of saying you want to acquire a set. This makes me think you see this as a 'starter set.' In which case it would likely be a very good set to have while you go through the learning curve of sharpening and using one of the most versatile tools in anyone's shop, the chisel.
Lee Valley has the set in inch sizes at comparable prices:
http://www.leevalley.com/us/wood/pag...07&cat=1,41504
The metric sizes on the amazon chisels do not convert exactly to the inch sizes. The 8,16 & 32mm do convert close enough to go unnoticed. The 20mm is closer to 13/16" than 11/16" as shown. (19mm converts to 3/4")
The differences between the sets in your links are the ones with the dark handles are mortise chisels. The light handled ones are bench chisels or paring chisels, they are longer than the premium chisels. The premium chisels are good all around chisels, especially if they need to be carried to job sites. They are a little lighter and take a little less room in a tool box.
As time goes by you will likely find each type will excel at a particular job. If you are of a minimalist persuasion, my suggestion would be to get the bench chisels. They can cut mortises, pare various joinery and be used to make hing gains (hinge mortises).
My preference is for a mortise chisel for cutting a mortise, but a mortise chisel isn't well suited for paring waste on dovetails.
The shorter premium set can cut mortises, pare dovetails and a lot of joinery but would come up short when paring a dado across a wide panel.
My shop is unheated. During the winter if woodworking is to be done, the sharpening is going to be done on oilstones. During the summer my water stones get their share of the sharpening duties.
My first chisel set was to be acquired one size at a time. One of the local hardware chains carried Sandvik chisels for less than $10 each. The first one seemed to be a nice chisel so a second and then a third was purchased. When it was time to buy the next one, the branding and handle design changed. After that my chisels were pretty much a mixed batch though mostly Buck Bros. and Witherby bought from the auction site, estate sales and where ever rust goes to be sniffed out by rust hunters.
jtk