Batch sparge is so much easier for the difference fly sparging supposedly offers IMO, unless you have a fancy setup.
What's supposed to be different is a few things:
1) Fly sparging isn't going to over shoot your sparge time as much. Normally you batch for 15 mins, then drain, so depending on your setup, it could be 5-10mins longer draining. Fly sparging, you keep the water level just above your grainbed and continually sparge untill done.
2) The grains act as a constant filter, like sand. Since you haven't disturbed the bed from the mash, all you're doing is letting the water sift through, picking up sugars as it goes, and filtering off any sediments.
But in order to do it, you need an even distribution of water on the grain bed, a watchful eye, constant attention, and strike water constantly heated. The colander trick is supposed to be a cheap version of fly sparging, but it seems iffy at best. You really need a constant water flow and a sparge arm.
Batches, you heat up, dump, stir, and drain. All you get in the end is a bit extra cloudiness...