Yes you can use a different thermistor. I use those because they are cheaper than the ones used on the extruder, but they only go up to ~150C because they are epoxy beads rather than glass.
Beware that a lot of tables in Marlin are wildly inaccurate, which is why I made my own for the thermistors I use. You could use the one I use on the extruder as that is common and I made an accurate table for it.
PM me if you want to buy a thermistor.
What is the advantage of a black bed?
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