I would imagine the one for a motorcycle would be smaller and click at a speed for the four bulbs, whereas a car has 6-8 or more, thus it would click at a different speed, the more lights installed on the blinker the slower it will blink, so stick with the non-motorcycle blinker.
Solid state should mean it doesn't rely on the "load" on the flasher to determine the flashing rate. On a standard flasher if you increase or decrease the load (by varying the number or type of bulbs) the flashing will get faster or slower. That is by design so there's an indication of a bulb issue. The emergency flashers are not as sensitive to load and will flash even with bulbs out.