I say always use Samsung Evo+ cards, you won't see a speed advantage on CPS2 but they are very high quality.
The Sandisk while more popular/common aren't nearly as good, I've had compatibility issues with some devices.
One system where you'll absolutely see a speed difference... Neo-Geo!
If you have the MVS/AES multi you simply NEED this (Evo+) card.
- DS CPS2 = 32GB Evo+
- DS MVS = 32GB Evo+
- SD2SNES = 32GB Evo+
- Mega Everdrive = 32GB Evo+
- Everdrive 64 = 32GB Evo+
- GBA Everdrive = 32GB Evo+
- PSIO = 64GB Evo+
- Rhea = 64GB Evo+
- GDEMU = 64GB Evo+
- OPL/PS2 = 128GB Evo+
- 3DS CFW = 128GB Evo+
- Switch CFW = 256GB Evo+