The lens that you have, used with those slides, will in principle give a higher resolution as the NA is quoted as 0.65 rather than 0.5 for the long working distance Motic objective. That of course depends on the lenses being designed and manufactured to the physical limit of their stated NA, and the illumination also being at least the same high NA. Transmission illumination at high NA from above those well slides may be difficult with the standard Openflexure illumination. There is about 5mm space below the condenser lens.
The LED grid illumination (thread here as well) is not particularly intended to address that problem, but does give you a bigger gap for 0.65NA I think, as it is physically wider than the standard condenser lens.