Although this should belong on the hardware subforum, and has been addressed many times…
If you use the tablet to draw and you draw a lot, need accuracy, need whatever could “replace” a traditional paper and pencil…
you need the largest tablet you can afford.
Simply, it will better map/emulate the screen space with the tablet space, and your movements will have more control.
A small tablet with a large/highres screen, will translate small movements (on the tablet) into large ones in the screen.
Good for sweeping strokes that have freedom, bad for accuracy and details.
On the other,if you just scan in traditionally made artwork, and just edit/finish it, photoshop it, but not actually draw that much, the small tablet will be just fine.
In any case I would buy a larger tablet, even a used one or an older model…