To prove it, we pitted the Blendtec Designer 675 against the Vitamix 5200 (our top-pick blender) in a series of tests, and the Vitamix won every time. The Vitamix was much better at smoothies, soups, nut butters—the things you’d need a kitchen blender for, in other words.
We chose to compare those two models because they offered roughly similar features and control schemes. The 5200 is Vitamix’s original variable-speed model, and it offers the power and performance Vitamix blenders are known for. Vitamix blenders with preset blending programs are more expensive, and we don’t think they’re worth the extra cost. Meanwhile, lower-end Blendtec machines have only preset blending programs, and the Designer 675 is the lowest-priced model that offers manual speed control in addition to those settings.
Source: NY Times – Wirecutter