Can someone please inform me?

What is the difference between the Lap-Band and the Realize band?

 Basically, different manufacturers.

Bette is correct.  The allergan band has bubbles that inflate all around the band, with a small space to buckle.  The realize band has bubbles around the band, with no space to buckle - you buckle over the bubbles. 

Google pictures of it if you want to look closer.  Neither is better than the other, in my opinion.

The Lap Band is a high pressure band and the Realize is a low pressure band.  I'm not positive but I believe that the Realize band is a one size fits all (at least it used to be) maybe it's different now.  The ports also attach differently.  The Realize actually clamps to you muscle.  The Lap Band is sewn in.  Some of this may be different since I had mine, so check it out on your own.  Good luck with your decision!