Micron vs. Sandisk: 1 Artificial Intelligence (AI) Memory Winner Is Down 20% and Clearly the Superior Buy Today

Memory chip stocks have been some of the biggest winners in 2026, but have given back some of their gains recently. Both Micron (NASDAQ: MU) and Sandisk (NASDAQ: SNDK) are down about 20% from their all-time high, but I think one of them is clearly the better buy.

Which one of these two makes the most sense to invest in right now? Let's take a look.

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Micron has a wider net than Sandisk

There are two primary types of memory chips: NAND and DRAM. DRAM memory is used in computing units for quick information access and is only manufactured by Micron. NAND is used for long-term data storage, and both Sandisk and Micron make it. Each type of memory is in short supply, which is causing prices to skyrocket.

There really isn't much difference between the NAND memory that Micron and Sandisk produce. As a result, it's a commoditized product, as an AI hyperscaler could easily swap out a storage device with Sandisk or Micron memory in it without losing performance. Economic laws govern commoditized products, and when demand is high and supply is low, prices skyrocket.

That's exactly what has happened in 2026, as the AI hyperscalers consumed all available memory capacity across both types of memory. In fact, Sandisk attributed two-thirds of its revenue gains in its recent quarter to price hikes versus one-third to increased production capacity. That's unlikely to change in the near future, as it takes some time for new production capacity to come online.

Micron informed investors during its last earnings event that the "tightness" in the memory chip market will persist beyond 2027, leaving plenty of time for both of these two businesses to make a fortune.

But of these two, I prefer Micron's business model. With exposure to both types of memory, it can thrive on one segment of its business if the other gains enough production capacity to solve the demand shortfall. Sandisk is all or nothing on the NAND side of memory as being in short supply, which makes it more of a boom-or-bust investment.

As a result, I'm giving this category to Micron.

Winner: Micron.

Both companies are growing too fast to declare a winner

In their most recent quarters, the growth rates these two produced are nothing short of incredible.

MU Revenue (Quarterly YoY Growth) data by YCharts

We'll get more information regarding Micron's current growth rate on Sept. 30, when it reports results, but as of right now, Sandisk has a slight lead. This is splitting hairs, though, as both growth rates are downright incredible.

As a result, I'll declare this category a tie.

Winner: Tie.

Micron stock is cheaper

From a valuation standpoint, Micron stock is cheaper than Sandisk's.

MU PE Ratio (Forward) data by YCharts

Although a forward price-to-earnings (P/E) ratio of 7.26 versus 6.18 sounds like a small difference, when the valuations get this low, a percentage point difference makes much more of a difference than a numerical one. Micron is 15% cheaper than Sandisk from this perspective, which is a fairly wide margin considering that these two operate in similar industries and are growing at nearly the same pace.

I think this tips the scales in favor of Micron, making it the outright winner as well.

Winner: Micron.

Micron makes the most sense as an investment

Although Sandisk has had a better 2026 overall, Micron makes for the better long-term stock pick. By being involved in both memory areas, it has a better chance of riding the demand wave longer than Sandisk. It also has immense upside if the market chooses to price it at an average market valuation, (which is more than double) making the stock a strong pick right now.

Keithen Drury has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Micron Technology. The Motley Fool has a disclosure policy.