I'm more bullish on silver than on gold because I think there is already (and has always) been a lot of interest in gold as a preserver of wealth (gold has been used as money for 5000 years). And as more and more people learn about the destructive effects of massive money printing by the central banks, more and more people will start to get into gold.
As this process unfolds, the price of gold will become "unreachable" to many/most average investors. When this happens, I believe that these investors will start to pile up on silver because (imo) silver is the "poor man's gold." And as Im sure all of you know, when everyone starts to "get in" on the "greatest investment of the decade" thats when prices start to soar and prudent investors will start to sell.
Also, silver is one of the most useful commodities in the world. Silver is used in computers, cellphones, solar panels etc. And I think the demand for these products can only grow whereas silver is a finite resource. This is a lethal combination for long-term investors.