All but one operational Maglev lines run at speeds below 160kph. Which is way lower than conventional high speed railways which usually run at speeds over 300kph. Also “non high speed” conventional railways in the UK have a top speed of 200kph, which is also faster than existing maglev lines, lol.
The only exception is Shanghai Maglev, which tops out at 430kph. But that line only exists as a Chinese propaganda tool.