I personally prefer Big Brother. LogBlock is really complicated, and I am unable to use the block placing thing (bedrock) because our server blacklists the placing of bedrock. Not to mention there are tons of commands etc. that don't seem to do much. Big Brother, on the other hand, is very easy to detect changes, and you can even do /bb here <player> <radius> to effectively check all the blocks in that radius at once.
So Logblocks command /lb player Hampi90 area <radius> is so more difficult to use? It's a bit longer but not hard to remember in any way.
Goes back to my point about BB being easier to use. I never knew you could do that in LB. Last time we used it, nothing was very obvious.
I used to use Big Brother but find LogBlock far better. The BB / LB / HE teams have all merged though to create a new, super...antigrief... plugin. Commands are simple to use and they get executed fast.