There are very (very!) subtle differences in flavor among light color Belgian candi sugar (solid, hard), Simplicity 0 and 5 (liquid syrup), invert sugar syrup, Lyle's syrup, table sugar (either cane or sugar beet based), dextrose (corn sugar), Turbinado, raw sugar, etc. Yeast doesn't care, and after fermentation they all taste pretty much the same, especially in beer, since any subtle flavor differences there may have been are largely masked by other flavors in the beer.
So, save your money and use the cheapest, most common sugar you have on hand: regular table sugar, Dominos or whatever generic your favorite supermarket sells.
Now the darker the versions of those syrups and candis the more markedly different they become, due to processes used. You can also make your own versions, it's fun and easy.