Difference between bodybugg core and bodymedia fit core

I've been researching gadgets like the bodymedia fit and the fitbit for soooo long and I think I've finally settled on the bodymedia fit. There's also the bodybugg core though which seems to be the exact same thing, however, it's $20 cheaper and comes with a free 6 month subscription instead of only 3 months. So is there something different about the one on the bodybugg site? If I buy the device from bodybugg/24 hour fitness will it use a different activity manager site? If not, then why is the price different there and the subscription offer better? Also, any input or opinions on the core device would be greatly appreciated. And if you'd like to try to talk a college student out of spending $100, I'm all ears :P I have a polar ft7 hrm which I love, but I really need to keep track of my calories during the entire day as well as my sleep quality.

3 months ago I was injured in a rock climbing accident and recently was cleared to start exercising again. I gained about 25 pounds over that time due to inactivity and depression and definitely need to lose it. It'll be my first time having to lose weight. BEFORE that though, I was having some trouble and had to go to the doctor a few times, because I was super active (athletic adrenaline junkie), would burn so many calories without really caring about calorie burn, never know just how much I burned, and always underestimated how much I had to eat, so got sick over a few weeks and felt awful and tired. My doctor told me I needed to pay more attention to my calorie burn and intake, so I thought about getting a device then, but a week later I had the accident and hurt my spine. Now I would like one for weight loss and then for weight gain and then just maintenance. Accuracy will be really important, so the fitbit's discrepancy of a couple hundred calories seems like a lot to me. Anyway, that's why I'd like the bodybugg thing, but if anyone thinks there's a better solution or device, then please let me know. I'm sorry for the length btw. I'm new here and to the weight game, so I guess I'm trying to get a good jumpstart which seems to have made me pretty wordy :P