So I got my ballistic sg maxx case today and let me tell you. I think the defender(and the other tpu cases in my arsenal) will be sitting on the sidelines for a while.
The ballistic is thinner and lighter. The buttons have way more feel to them. I can actually feel the presses on the shutter button. On the otterbox the rubber is very hard. The ballistic is awesome it fits the phone perfect. I didn't use the replaceable screen protector because i have a zagg installed ( I take the built in one out of the defender too) and it still fits like a glove.
I got mine for 22 bucks shipped on ebay. I would definitely suggest it to you guys. Considering it's upwards $50 bucks on their website/in store. I have the white/black. The clip is nice too. Also thinner profile than that of the otter. The ONLY thing I dislike is the ballistic has its own kickstand which isn't spring loaded and feels like it could be easily broken. I really like how the otterbox let's you use the original. I guess it's both a good and bad thing. On one hand its preserving the original kickstand,which is showing wear on the tip because I use it so often... But anyway, that's my only gripe.
I'm going to run this case for a couple weeks I'll keep you all posted!