While both microSD cards come in multiple sizes, the Samsung EVO Select is the better choice for 4K recording while the SanDisk Ultra offers better value for those who don't record in 4K.
Samsung EVO Select vs. SanDisk Ultra: Tech specs
|Samsung EVO Select||SanDisk Ultra|
|Storage size||32GB, 64GB, 128GB, 256GB||8GB, 16GB, 32GB, 64GB, 128GB, 256GB, 400GB|
|Speed class||Class 10, U3||Class 10, U1|
|Environmental protections||Water resistant, heat resistant, mgnetic protection, x-ray protection||Water Resistant, heat resistant, magnetic protection, x-ray protection|
As you can see from the spec list the EVO Select and the SanDisk Ultra have similar read speeds but the biggest difference is in the write speed. That's because the SanDisk is only classed at U1 instead of the U3 of the Samsung. The U Number tells you what class the microSD is when connected to devices using the UHS transfer bus. It's technical, but generally the higher the number the faster the write speed from the device to the card.
As the SanDisk only has a U1 rating it can only write data and around 10Mbps, which is perfectly fine for DSLR cameras capturing RAW files or taking pictures on your phone, but won't really be sufficient for recording in 4K on something like a GoPro. The Samsung Evo Select, however, has a U3 classification, which means it is capable of much higher write speed, around 90Mbps, and is the best choice if you are recording 4K video on any device.
While the Samsung is the faster of the two microSD cards the SanDisk does come in many more size choices. While it feels it would be better to always go for the biggest capacity, it may be better to select several smaller cards to make sorting media easier. The EVO Select comes in four sizes while the SanDisk comes in seven, including a massive 400GB model.
Is Samsung EVO Select or SanDisk Ultra a better microSD card for you?
To choose the right microSD for you we need to look at your use case. Unless you are specifically going to be recording video in 4K then the SanDisk Ultra is a better choice. At $26 for the 128GB version it is the cheaper option, and while not being as fast as the EVO Select, the choice in sizes gives you far more options.
Of course, if you do intend to record video at 4K then choose the EVO Select. The faster write speed is invaluable for recording great 4K video.
Great value with all the choices
For anything other than 4K recording the SanDisk is a clear choice
With such a large choice in storage sizes and a price range anyone can be happy with, the SanDisk Ultra microSD card is an extremely good choice for anything except 4K recording.
High speed in a range of sizes
Samsung EVO Select
For 4K recording, you want the EVO Select
The Samsung EVO Select is the clear winner when it comes to technical specifications. If you think you may want to record 4K at any time in the future then pick this microSD card up instead of the SanDisk but remember, it's exclusive to Amazon so you'll have to get it from there.
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