Is there enough variation in the tone to warrant buying an SRX400 if I already have an SRX300? I just acquired an SRX300 in a trade not even really wanting it but feel in love with the neck. I've been looking for something with a retro look and have always like the quirky looks of the SRX400 but if the tone is very similar to the 300 I don't know if it would be worth it. If you had both which one would you put flats on? I'm thinking the 400 would be kinda cool with flats. What do you think? Thanks.