I think the difference is the "play to win", vs "play to win by any means you can". Sandbagging (imnsho) is Paramount to cheating. Take that gambling "win at all costs" mentality and confine it to the rules and good sportsmanship and you have a winning attitude/philosophy I believe.
Thank you for the reply.
I never really had the "win at all costs" mentality, as I'm as of an honest Person as I can be. My playing partner back in the day had some of that 'win at all cost' attitude and it was my job to keep that in check so we didn't have any violence after a win. Maybe it was being partnered with him that kept me in the winning attitude? I suspect that, as I don't play with him anymore, as I got better and he didn't so he dumped me and pool, it seems.
Also, I never sandbagged on purpose. We just showed up and kicked ass...or not.

Jeff Livingston