Some folks keep logs of their projects including time spent. I can understand the urge to quantify, but I build boats, build model boats, carve decoys, and rebuild bicycles for the fun of it. When I worked as an engineer, I had to keep track of time spent for billing. It was not fun. When people ask me how much time I spent on a project, I usually reply "How much time did you spend watching TV?"
Having said that, I agree with Scott that a SOF kayak goes together quicker than a stitch-and-glue kayak, based on my experience. Another difference is that almost all tasks on a SOF boat can be done in small time periods. For example, you can take 15 minutes to cut out one frame. You can mount one frame on the strong back. You can sew one foot of the skin seam. Of course, it's likely that you'll work for much longer periods (time flies when you're having fun), but you can do bits here and there. In contrast, there are major tasks on a stitch-and-glue boat that cannot be interrupted. These require mixing epoxy and applying it all at once.
Stitch-and-glue boatbuilding is noisier (lots of sanding), smellier (epoxy), dustier (again sanding), and messier (again epoxy). I find SOF boatbuilding more fun. James, I hope you have fun building (and paddling).