From the welders perspective there would be no difference. Its still an austenitic and to be welded with similar regimes. Doa search in the forum and oyu might find some posts by chuck Meadows onthsi alloy.
201 has Mn and N to replace Ni in order to maintain the austenitic microstructure. Be aware of the higher carbon and the possibility of sensitization if thats an issue for your intended service, which it probably isn't since 201 to my knowledge 201 is generally specified more for its mechanicals than its corrosion properties, though corrosion is still clearly an issue or a SS wouldn't be spec't at all, I would think.