Same family, different jobs.
Motor Power: BlendSense vs smartTORQUE
The real difference is how each motor thinks. BlendSense technology senses ingredients and adjusts speed and time. smartTORQUE technology powers through thick blends and never stalls.
Smoothies, Ice, and Thick Blends
The TB401 wins for everyday drinks: fewer passes, smoother texture, ice to fluffy snow in about 30 seconds. The SS401 crushed ice in about 20 seconds but needed more tamper work.
Food Processing: Slicing, Shredding, and Dough
The TB401's 64-oz bowl chops and kneads up to 2 lbs of dough; the SS401 has no processor bowl, so its slicing, shredding, and grating discs made weekly prep faster.
Capacity, Attachments, and Single-Serve Options
Both ship with a 72-oz pitcher and a 24-oz single-serve cup; the TB401 adds a 64-oz processor bowl, the SS401 an 18-oz Smoothie Bowl Maker.
Ease of Use, Cleaning, and Maintenance
The SS401 has more twist-and-click locking steps, and matching blade to cup feels like a puzzle.
Price and Value for Money
The TB401 and SS401 list at nearly the same price, so compare current prices: Buy TB401 on Amazon or Buy SS401 on Amazon. At about the same price, the TB401 makes smoother blends and kneads dough more easily; the SS401 earns its price only if you use the discs and Smoothie Bowl Maker.