More high frequencies in the oscillators.
Improved filter (2x oversampled for better sound, uses a bit more CPU).
More resonance at high frequencies.
Wider range in PW modulation.
Other small issues fixed.
"A unique -18dB low pass filter with a lot of asymmetric and random components introduce a warm and analogue sound. Very fast, non linear envelopes are also a part of this synth." Link