Hi Atm,
Here is another
link on dashes you might find useful. Here is another
link on colons that you might find useful.
With regard to your question, I would say it is 1. Abrupt break or interruption.
1. But when it comes to racing, we know who is the best bet--horses.
2. We worry about all the things around us such as hot jobs, emerging fields, prestigious companies and so on but fail to look for the answer where it actually lies--inside us.
To me, a dash is a bit more emphatic that a colon. You want to call attention to what lies beyond the dash. So in your two sentences, you have set up the sentences for this emphatic ending.
Here is a
another link that discusses dashes giving more emphasis than colons.
I tend to think of colons as list generators or short punchy summary points. I tend to think of dashes as having more emphasis.
I hope that helps.
MountainHiker
Useful for my searches later on.
Keywords: dash, colon, emphasis, summary
Previous link mentioned earlier: http://www.sfu.ca/~gmccarro/Grammar/Dash.html