Buy the Black+Decker MX600T Helix Performance Hand.

Same wattage, but it comes backed by triple the warranty and a track record 30 times deeper.

What was compared

1. A warranty that actually covers baking's lifespan
Black+Decker backs the MX600T with a 3 year limited warranty, while the Oster gets just 1 year. A mixer you use for holiday baking every season needs to survive more than one year of that, and only one of these promises it will.
2. Bread dough and cookies, not just batter
The MX600T ships with 2 dough hooks plus a wire whisk on top of the beaters, so it actually handles heavier dough. The Oster listing only mentions a basic beater set, meaning bread or cookie dough is a fight the Oster was not built for.
3. Thousands of owners already vouch for it
The MX600T sits at 4.5 stars across 15,301 ratings, the Oster at 4.2 across just 445. That is not a close sample size, it means the Black+Decker's reputation is proven at scale while the Oster's is still mostly a guess.
4. Beaters built for the tough mixes, not just cake
Black+Decker reinforces the Helix beaters in nylon specifically to survive stiff mixes like thick cookie dough. Oster does not make an equivalent durability claim for its beaters, so repeated heavy mixing is where the MX600T is designed to hold up longer.
5. Yes, the Oster is cheaper. Buy the B+D anyway.
The Oster undercuts it by about 25 dollars, real money if you mix batter twice a year and nothing more. But a hand mixer gets used for years, and the extra tools, the triple warranty and the proven reliability pay that gap back fast for anyone baking regularly, which is most buyers of this.