Product review (4 stars): Sentinal filter seems fine and costs less.
I just got these two weeks ago as a replacement to the Brita's I had been getting for a couple of years.  We live in the Boston metro area (no well water), and there seems to be a fair amount of sediment in the water (old city pipes maybe).

My Brita Pitcher filter prior to this never clogged and we used it about 4 times as long as it suggested.  The GE and Brita filters "clogged" or became unusable after 3-4 months making drinking water relatively expensive.  I don't know what kind of difference there is in the filter so I don't know if they truly get clogged or if they are designed to lock up after so long.  I will eventually cut a used one open to find out.

There was only a single gasket in the Sentinal box (other reviewers said they had a second in the box).  I compared it to the Brita gasket and it was thinner.  So I put the Brita gasket in the Sentinal.  NO LEAKING.  Don't know if the Sentinal gasket would have been fine but I didn't want to take the time to find out.

Other differences are that the Sentinal has a flat bottom and the Brita rounded.  The Sentinal has a notch in the mounting plate (unlike the Brita).  Documentation says it is there to check for leaking.

How's it compare?  I don't know about taste.  It seems the same to me.  Without testing water samples from each I have no idea if one is better at filtering then the other.  The Sentinal definately runs water faster then the Brita.

I will try to upload some pics and hopefully update this as it starts to clog/slow down.