How do you figure OME struts give you less travel than stock struts with 2" spacers?
Maybe I didn't word that very well. I was referring to strut spacers/extensions. The strut spacers give you 2" of extra travel, the OME stuts give you 1.5" of extra travel. The pic below shows the strut with the spring removed and the wishbone hard up against the bump stop. The stock strut has 6" of travel but only uses 4", when you lower it with the spacers you get to use the whole 6" of travel.

Of course you can combine the OME strut with spacers you get even more travel but you really do need to watch your CV angles. I have the OME struts on the Calmini 3" kit and there wasn't enough travel to run the 2" Calmini spacers. I'm going to try some 1" spacers but it seems a shame to still have 1" of strut travel unused.
The OME struts are good but if your stock struts are good and you just want more travel then compare the cost of the OMEs and the strut spacers - no contest, spacers win every time - far less money for more travel.