I've owned the EarSonics SM3 for a year. They are an excellent universal for their price, and they sound better than many other universals on the market to me. They also have one of the most unique sound signatures that I've heard on a universal. When it comes to whether or not the 1964-T sounds better than the EarSonics SM3, it's almost impossible to say unless we can gain an understanding of the type of sound signature you like.
The SM3 produces a really thick, warm, creamy midrange that many people enjoy. However, you might not like this at all and thus the IEM may not be for you. You might be better suited with something that costs 3x less, just because of that IEMs' sound signature over the SM3's.
So it is much more dependent on your preferences than strictly the IEM itself (a frequency response graph does not even come close to telling the whole story).
For me, the JH16 Pro sound much better than the EarSonics SM3, and I've had the opportunity to A/B them for weeks. But then again, I am comparing a $1,000+ custom with a $400 universal. Does it mean then that the SM3 is not competent against the JH16? Not at all. They both present music in very different ways, and so it is enjoyable to listen to both. But overall I ended up much preferring the presentation of the JH16 as well as the added technical capabilities of the JH16. The fit is also spot-on, but it took over four re-fits for me to get the fit just right (you should definitely consider this in your purchase, as fit problems are common with customs--you may end up sending your customs back several times to achieve a perfect fit).