Not enough specifics shared. Showplace is generally higher quality, and allows for combining inset, but their frameless isn't as good. Their shelf clips need to be replaced out of the box. They are bad. WWWood is having quality control issues, and delivery time issues, but has produced a good but not great product in the past, and probably will for the future. So, it depends on the specifics of the whole, and the skill of the kitchen designers invovled as well. A bad kitchen designer in Showplace will leave you with problems, even if the line is "better".

Overlay, paint vs stain, wall cabinet height, specialty features, which line of each, size of kitchen, who's designing, who's installing, etc.