Is InRoads Suite SS2 08.11.07.615 compatible with Microstation SS4 08.11.09.832

I've been using IR suite SS4 but have a desire to use SS2 from time to time.  I have read where IR SS2 and SS4 can co-exist but no mention of the Microstation version.  In the SS2 downloads it doesn't list Microstation SS4 the companion download product. 

Can I use MS SS4 for both and what else do I need to be cognizant of?