This advise might come a little late since it looks like you have chosen... but...
I totally sympathize with you D. It's not easy choosing between these two. The second guy has his Mercury conjunct yours. This energy will feel like the two of you seem to have the same thought process - to a point where no words needed to be spoken. It's like telepathy almost... you think alike, just "get" each other like noone else can. You also have Venus conjunction. This indicates that the way you express and feel love is very similar. These are two great aspects in a relationship. Lots in common in those angles. Then, you also have his Mars conjunct your Sun. Wow. Very nice indeed. There are a lot of nice aspects in this match. Energy matches.
The first guy and you also have a lot of nice aspects. To begin with, you have a Sun-Moon conjunction which is one of the best in any relationship. To boot it off, your ASC conjuncts his Sun and his Venus Conjuncts your Moon AND Mars. If this is not an awesome match, then I don't believe there is one.
Now, in my humble opinion, (all things being equal; i.e., both have good jobs, both treat you well, etc) for the long run, I would go with the first guy. The second guy seem very earthy. This might be such an attraction for you right now when the relationship is just starting, but might not be so attractive when you want to go out and have fun with friends and he's too busy at work (he's a Cappy, afterall).
The only thing to remember D, is that you are soooo blessed. I am sure a lot of people would give a right arm to meet just one guy that matches you so well, let alone two! I only pray that you are wise enough to decide and then strong enough to stick to your decision. I mean, you wouldn't want to lose them both... due to mis-step...
Truly and sincerely,
MM