From what I can tell, the Diamond Suite is actually a 2-room suite, rather than just a large room. Looks to be no material difference in price. We like having two rooms if one of us is up reading while the other is asleep, but it isn't a deal-breaker. We've never gambled at either casino, though we've spent some time at TI when Isla was still there. I've basically only walked through MC. Pools aren't an issue for us. We'll be coming off a huge, high-stress project and will want to relax but want easy access to dancing, some low-roller VP, a bar with friendly staff/food and a good place to watch the Cowboys play on Sunday. It will also be halloween while we're there, so if anything special is happening at either place, we might be interested. Since we're pushing 50 hard, the nightclub scene isn't for us, though we might find a vantage point to have a drink and people-watch. Any advice?