G4 plus 2gb vs 4gb

I bought a g4 plus base model from best buy. the 16gb - 2gb ram model. runs well but im curious how much better the 64gb - 4gb ram model would perform? It is worth the extra $50+? Im considering ordering at best buy and exchanging my 2gb model and use the free $50 bestbuy gift card i recieved when i purchased.

Thanks.

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