One hazard with using different strobes is that if you are setting them manually, the light levels will be different given the same settings. I have a Sea & Sea YS-110 (had two, one broke) and replaced my second with a YS-D1. The YS-D1 is much more powerful. When shooting wide angle, if I set them the same I experience flare on the side with the YS-D1. A solution to this is to set the more powerful strobe to a low setting and leave it there, adjusting the weaker strobe to control light levels. A better solution is to shoot ttl (or in the Inon case, strobe TTL) and the strobes will adjust themselves to the available and necessary light. You can also set the weaker strobe as a fill flash, leaving it on a low setting and adjust the more powerful strobe individually, based on results. If you have a blown highlights screen and a histogram available, you can check and adjust your flash level and shutter/aperture settings after a couple of shots.