In the pool 2, you can stake yout SIG/ETH pool share. Please note that SIG/ETH pool is completely different from xSigma stablecoin pool. It is located on Uniswap and requires both SIG and ETH to provide liquidity.
However, pool 2 may have higher yield in case it has less liquidity staked than pool 1.
The longer you keep your shares staked, the more rewards you will receive.