As some noted above, this is a NSA arrangement, more GFE than a normal provider, clock goes away, and usually (though not always) including a significant social component. There are all sorts of ladies who want SDs, including a lot who would fiercely declare they are not providers in any way, and they are not being paid for sex. Not so much, but it is how they feel. At the other extreme, there are women on SA who are absolutely providers, just selling on that platform. They host, they book private dates all the time, and do not want to waste time on social stuff. The main differences are a somewhat lower price point, and a much more flexible clock - one usually just pays to see them, not for an hour, 90 minutes or whatever. You play until you are done.
Unlike my friend above, I strongly disagree with the point about exclusivity or not being solely a function of how you get paid. Jealousy and possessiveness exist at all price points and with all arrangements - they are a function of the individual, not the money or form of payment. Some people get NSA, some people do not. Of course, if you pay someone enough that they can stop seeing anyone else, they probably will, but not because he demands it or she wants to be faithful. It is just easier. Of course, just like with providers, a guy who pays a lot more can request and get a lot more, but whether that is exclusivity, BBFS, some other service or set of things, depends on the individual.
And there, my dear is the biggest difference. Each arrangement in the Sugar World is a unique arrangement between two people. It is much less standardized than with escorts, everything gets discussed and agreed upon, from how often you meet, what sex you do, where meetings occur, what you do together, how much is paid, and how you get paid. All of which takes time. The tradeoff for you is pretty clear - you lose a lot of marketing and overhead expenses, no longer need to screen, are off in a grey legal world that probably is mostly legal, and get treated a lot like a GF who can expect to be treated the way she likes both in private and public; in return you get a lower hourly rate, spend more time negotiating deals and meeting with potential SDs to see how it works, and end up seeing fewer guys (which is both better and worse).
I have a friend who has done tax returns for providers on and off for a while, and when I made the case to him that providers make a lot less money than SBs, he laughed at me and said it was not true for 90% of providers because of all their expenses. A SB with one rich daddy, or two or three decent ones, can easily net six figures and have a more predictable and comfortable lifestyle. But if you are netting more than that as a provider, and like the structure and distance from the clients of that situation, stay a provider.
Hope that helps.
zig