Which is better Phoenix or LolMiner?

PhoenixMiner 5.4c: fastest Ethereum/Ethash miner with lowest devfee (Win/Linux)

In terms of efficiency, LolMiner has surpassed Phoenix , the once most popular ETH mining software. Phoenix and NBMiner ranked the bottom two places. The main reason is that the hash rates reported by these two originals are much higher than the actual results.

4GB VRAM graphics cards are not good for Ethereum mining because they do not have sufficient memory to run the GPU-intensive calculations of Ethereum mining. DAG size of Ethereum is bigger than 4gb. Thats why you can’t mine Ethereum with 4gb graphic cards.