Re: RG350 or RG4EXFM1
In a monetary sense, money is an issue - but not concerning guitars. I currently have an 150$ electric (the GRG-170M) and I consider myself lucky to have found a good model - maybe it's the tree it was cut from, maybe it's just sheer chance, but the guitar sings.
As a rule of thumb, and pertaining to your question - play them unplugged. See which one sings the most, and look for something that's vibrant, with an almost acoustic volume. That defines a good, resonant guitar, regardless of price. The features are generally a secondary concern, whereas the wood and resonance are pretty big.
For my part, that's the most important criterion.