It depends on what your goal is. I've never used MAG-10 or the full Anaconda protocol, however I'd like to try it out during my next mass gain cycle.
Surge Workout Fuel works great for me when I need lots of endurance. For example, long intense workouts, or intense cardio sessions. It gives your body what it needs to keep pushing.
Surge Recovery is a good for strength training if you're looking to build muscle but don't want to pay for the Anaconda Protocol.
In general, if your goal is strength training, building muscle, and an easy workout shake, I'd say go with the Surge Recovery. I like the taste and it seems to work well.
I'm sure the mods could give you better advice than I could if you tell them what your goals are.