Standard Range is rated for 320 miles per charge, which is a significant 85-mile disadvantage when compared to the 405-mile range of the regular Model S, which is still available on Tesla's website for exactly $10,000 more than the new Standard Range. Same goes for the Model X Standard Range and its 269-mile rating. For exactly $10,000 more, the Model X crossover offers 348 miles of range.
There is also a slight reduction in acceleration from the two new S and X offerings. While still quite quick by any reasonable standard, the Model S Standard Range is estimated to go from 0-60 in 3.7 seconds, down .06 ticks from its more expensive sibling. The Model X Standard Range is the same number of ticks slower to 60 than the next-least-expensive X with an estimated time of 4.4 seconds.
We don't yet know what sort of batteries the new Standard Range Model S and Model X are using. In the past, Tesla has sometimes used software to artificially reduce the range of its vehicles by locking out a certain amount of battery capacity. The automaker would allow buyers to pay an additional fee after the initial purchase to unlock the battery's full capacity.