Want to know one of the most common Keurig-related questions we're asked?
What's the difference between Keurig's B series and K series brewers?
Answer: Nothing. The switch from B to K was solely a marketing decision as the company realized branding their brewers with a K made more sense. (They're called Keurig, after all.)
The B50 series was Keurig's first brewer with an LCD messaging center.
In fact, that was the only upgrade from the B40 series, as B50 series brewers still offered just 6 oz and 8 oz brew sizes and a 48 oz water reservoir.
To get a larger 10 oz brew size, you needed to upgrade to the B60 Special Edition series.
This B55 brewer comes with a K-Cup variety pack and water filter starter kit. The B50 comes with just the K-Cup variety pack.