I'm going to venture that they are not compatible. The only compatibility with ores between mods that I'm familiar with is Industrial Craft and Red Powered in that you can macerate and make use of the powders with both versions of copper and such. Outside that, no you'd simply have two different silvers. At the very least you'll have distinctly different ores coming from this one I assure you. The ingots though, may look similar since those can't be done as unique as ore blocks.