As an Amazon Associate, The Counter Lab earns from qualifying purchases. We don’t do hands-on testing and we don’t accept free units. Everything below is compared on manufacturer spec sheets and prices we read ourselves — each price is stamped with the store and date we read it, because prices move and the number at checkout is the one that counts.

Vitamix and Blendtec both sit at the top of every “best high-performance blender” conversation, and the marketing from both camps makes it sound like the two machines are nearly identical under the shell. They aren’t. The biggest real differences aren’t in the box’s horsepower claims — they’re in the warranty (five years vs two), the jar you’re actually blending in (48 oz vs a 90 oz jar with a 36 oz blending capacity), and how you drive the thing (a 10-speed dial vs four preprogrammed buttons). Here is what each brand’s own pages publish, side by side.

Warranty: the clearest gap in the comparison

Blendtec’s current official warranty page lists the Classic 575 at 2 years parts / 2 years labor, residential use only (commercial use voids it). Vitamix’s Explorian E310 carries a 5-year full warranty, confirmed in Vitamix’s press release and current retailer listings. Three extra years of coverage on a $350–400 machine is real money: if you keep appliances a decade, Vitamix is backing more than twice as long as the Blendtec flagship-entry machine.

The honest nuance on Blendtec’s side: the 2-year term is for the Classic line. Blendtec’s own warranty schedule gives the Designer series 8 years and the Professional 800 a full 10 years — so the brand is perfectly willing to back a motor for a decade; it just doesn’t do it on the $399.95 model. (Some older deal listings still advertise an 8-year warranty on Blendtec models, but those are outdated listings, not the current official schedule.) Blendtec also sells extended warranties on the 575 — 3 more years for $75, 6 more for $125 — if you want to buy the peace of mind yourself.

Jars: 48 oz vs 90 oz (read the fine print)

The Vitamix E310 ships a 48 oz Tritan jar (BPA-free). The Blendtec Classic 575 ships the WildSide+ jar, which Blendtec and retailers describe as 90 oz of jar volume with a 36 oz blending volume. That second number is the one that matters: a full jar of soup is capped by the blending capacity, not the brim. So the jar gap is real but narrower than “90 vs 48” suggests — the Blendtec works a smaller practical load inside a big jar.

Both jars are BPA-free Tritan/polyester. Neither brand’s page publishes a decibel figure for these models, so we leave noise blank rather than borrow a number from a review site.

Programs: dial vs buttons

This is the philosophical split. The Vitamix E310 is fully manual: 10 variable speeds on a dial plus a pulse switch, and no preprogrammed cycles at all. You are the program — ramp up slowly for chopping, hold full speed for smoothies, pulse for chunky salsas.

The Blendtec 575 is the opposite: four preprogrammed cycles — Smoothie, Clean, 60-seconds, 90-seconds — plus 5 incremental speeds and a pulse button, all on an illuminated touchpad with an LCD timer showing the time remaining. Press Smoothie, walk away, the machine ramps and stops on its own. The Clean cycle runs a self-clean with water and a drop of soap, which Vitamix’s E310 doesn’t match with a dedicated cycle.

The published specs, side by side

Per-case verdicts

• Buy for warranty peace of mind: Vitamix E310. Five years of full coverage vs two — the single biggest verified difference between these two machines, and the one that costs the most if you guess wrong.
• Buy for big batches: Blendtec 575, with a caveat. The blending volume is 36 oz, not 90, but that’s still meaningfully more working room than the E310’s 48 oz jar for soups and smoothies-for-the-house.
• Buy for one-button blending: Blendtec 575. Four real presets and a self-clean cycle; the E310 makes you drive every second of the blend.
• Buy for manual control: Vitamix E310. A real dial with ten speeds and pulse rewards anyone who wants to texture a blend by hand — chunky salsa, coarse nut chops, graduated ramps.
• Buy for price: neither has a clean win right now. The E310’s last read ($349.95) was cheaper but out of stock at read, so treat it as “recheck before committing”; the Blendtec 575 was $399.95 in stock on Oct 7.

How we compared

Every figure above is exactly as the brand or retailer published it on a page we opened ourselves: Blendtec’s official product and warranty pages, Crate & Barrel’s E310 listing, Vitamix’s press and retailer coverage for the warranty term. Prices are our own dated reads (Oct 7, 2026) at the stores named. Vitamix publishes peak HP, Blendtec publishes watts — we store each as published and never convert one into the other. Where a page didn’t publish a figure (Vitamix’s US wattage, both brands’ noise figures), the table says so instead of borrowing from Amazon spec tables or other reviews. This post carries no buy buttons because we only link Amazon for models whose ASIN we’ve confirmed against the exact model number, and no model-confirmed ASINs exist yet for these two blenders — prices are shown with the store and date read instead.

Next step: see where these two land in our best blenders guide, browse every spec-checked model on the blenders hub, or read why the watts and horsepower numbers don’t compare in our blender watts vs horsepower explainer.