If you aren't a watch wearer, the biggest suggestion I can give you is to find a band that you like. That is were the comfort comes in. I personally like the neoprene/rubber type bands. Metal bands seem to snag my wrist hair and I don't like scratching them (must like stainless steel body knives). Nylon/cloth types bands tend to absorb sweat and can hold a stink imo. The rubber ones are the most comfortable and don't stink (literally heh).
I also prefer a digital watch. I like to see a date on the dial, stop watch (I time things at work), and an alarm (great for reminders at work).
As for the two you ordered, I like the first one. I don't like the face of the second one but that's my opinion. I might suggest trying something with a neoprene type band to see how it compares to the metal bracelet.
I love Casio's. Most of my watches have been G shocks.
ps. I should mention that the first watch is more "work appropiate" depending on what you do. Some folks look down on digital+rubber bands in the dress code department (again, depends on where ya work).
Just my $0.02. I'm certainly not watch expert. I've never paid more then $60 or so for a watch.