i was originally looking into the yellow/red top but then decided to get the braille battery. at first i got the model 2015 all season which was half the size of oem and about 5 lbs lighter. rated slightly more amps than stock. had it for about 2 years. the first winter was fine but last one the batery was going down hill. if i left it for more than a day without starting it it was dead.
so i looked on their site and noticed that they came out with a slightly bigger model 3121 which i just bought a couple of weeks ago. same amps and specs as the red top. as soon as i put it in and started the car i noticed a huge difference and how it cranked up to start. the stock battery and even the first braille i got cranking was very slow. with the 3121 it was much faster and easier to start. windows rolled up/down quicker. volts were at a steady 14.5 on start and went down to a 14.1-2 after warmup. much better power. probably will save my starter too from overwork.
Braille No-Weight Batteries