Realize the 'toyish looking'Tyros housing contains 128 note polyphony machine. SD1 & Korg have 64 and 62 (!) note polyphony.

Both the SD1 en PA1 show timing problems/latency while playing. It took a while before I got used to the very fast sound-generator of Tyros. Especially the brass-sound is soo much faster.

The keyfeel on Tyros is not as good as the Korgs/Ketrons...... but 'bad'? NO!

Sure I could list lots of pros and cons of all, but personal ranking (1-10):
Tyros = 9
SD1 = 8
PA1 = 7