How is the noise level? Is it comparable to the SP20 or lot more than it?
Comparable to a few S5s, which are comparable to a few SP20s although a much less annoying quality of noise.
It sounds like you do not have one on hand. Are you giving advice based on hear-say or do you have one in your possession? Sometimes it seems that you just like the sound of your own...fingers typing...
Its the same fans as on the S5 which is the same as the S4+ which is the same as the S4, of which I've had up to 15 running in the same room at once. So no I don't have an S5+ on hand, yes I can still comment on its noise levels.