I cannot speak for Ropes and Straps or Boot Camp as I have not seen either.
For Fat Loss- Train like the Pro's, Team Sports and Cosgrove are all excellent for metabiloc conditioning.
You can also check out Cosgrove's blog for some other ideas on creating metabolic work with the TRX. All three are time based training, just typing about them I can feel the sweat starting to pour.
I look at it as having all those options gives you a year or so of training already planned out. The body adapts and needs new stimulus, so if you line them up and work at them for 6-12 weeks each you should be set for a while