Yes, if you click on the link below you will get four diameter sizes to choose from and if the 160mm shebang is not already selected, you can still do that.
Shimano RT-MT900 (160 mm)
140/160mm always have only four struts. 180/203mm have five struts. Sometimes you can't rely on pictures at Galaxus. If there is a difference, then the others could have external teeth. However, the manufacturer number listed there also points to internal gearing. The ones here definitely have internal teeth.