this is out of the article "AISIN Hubs - Identification and Rebuilding Guide" in the link I posted above from offroad.com

[color:"blue"]The Suzuki and 30-spline Toyota hubs are virtually identical except for the inner hub. The grips on the dial of the 30-spline Toyota hub stick out slightly beyond the cap, where on the others, it is flush. Functionally, the dials are interchangeable between the Suzuki and 26- and 30-spline Toyota hubs. The 26-spline (IFS) Toyota hub has a deeper backspacing between the mounting flange and the inner hub than the other hubs, in order to clear the spindle nuts. [color:"red"]Because of this, the Suzuki or 30-spline Toyota hub body will not fit on an IFS toyota wheel hub, but the reverse should work; i.e. a 26-spline Toyota hub body should be usable on a Suzuki or 30-spline Toyota hub.[/color][color:"black"]

So only the 26-spline hub BODY can be used on the 30-spline hub. Other than that - no interchangeability as noted above. You could also use Suzuki 30-spline hubs if you run accross some.