MFSK16 is a much wider signal than the little PSK31 pairs, it looks like this on the waterfall display.
On the receiver, it sounds rather musical. Because it's spread out it's more immune to interference or selective fading.
I'm using CocoaModem at my end and it seems very smart in the way it decodes, here's the tuning indicator showing a very clean decode:
Compared to PSK31 there is a delay I think before characters are decoded, presumably that's the forward error correction at work, but I got pretty good copy from Dallas over 1,000km away running 20W: