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Entirely depends what you want the PDA to do. Not sure what you mean by "high endurance" as this describes nothing technical!
If you want 4K video (little point on a small screen) then opt for 90MB/s
If you simply want to dump Docs/PDFs then anything will do
For myself, I bought a Samsung Evo Plus (3) rated 128Gb card because I love high definition audio (via headphones socket)
These high endurance cards are designed for video recording, i.e. dashcams. Some reported these cards to last longer, when using as system disk for raspberrys. However, I have not found any reliable information on this. Originally I used a Sandisk class 10 in my banana pi router running debian, which broke after aproximately half a year (logging, etc). After I replaced it with one of these the system works without problems for longer than a year. So if it does not make a huge difference in speed it might make sense to use one of these to avoid it getting broken due to heavy use.