Thought people here might be curious about my observations with both the EVO and EVO+ cards from Samsung. I have 3 of the 32GB EVO cards and 2 of the 64GB EVO+ cards. They're decent enough cards, generally on par with Sandisk and Samsung has really been pricing these low enough lately through various retailers to make them readily accessible.
In theory, EVO+ is superior because it boasts better speeds. Samsung specifies 80 MB/s read and 20 MB/s write speeds for EVO+, while a mere 48 MB/s read and an unspecified but "twice as fast as other cards" write speed for the EVO.
In practice... I can't reliably test read speeds as I'm using these in my $10 Chinese IQQ brand MP3 player, I'd wager the device can only read at a maximum speed anyway, but I have no problem loading music when playing, loading the next track is fast, browsing folders is smooth. Both cards work the same. Granted, the onboard flash chip in the player itself works the same, so the player itself may not need great speeds.
Write speeds, however, that's interesting. These were written to via the Micro SD slot on front of the computer. EVO+ boasts 20 MB/s max speed, and I can see it hit that when I start dragging a folder to a card, but I noticed it quickly drops that speed. A single folder with maybe 10-15 MP3 files, or a band folder with 3 albums of maybe 30-40 files, in the few seconds it takes to transfer, will start at 20 but quickly drop to about 9-10 depending on the files. Top I see it level at is 15. Average seems 9-12 overall but closer to the 9-10 range more often with a larger transfer.
The EVO, however, seems to actually write faster, the average being generally between 12-15 with 14 the most common, 10-11 the rare low and 17 an upper limit.
It's interesting, the EVO+ can meet its boasted write speed, but it can drop to half that speed depending on what you are writing to the card and can do so quickly. Maybe it's more optimized for single larger files or continuous writing with video recording, but it chokes a bit when multiple smaller files are being written. The standard EVO seems to handle writing a folder with many smaller files much better with faster overall speeds.