For some reason I can't reply unless I click the quote button, Rather odd, anyhow....
The big new thing is poly, hardly anyone uses kevlar anymore because of it.
Basically it is stiff with a lot of control and awesome spin. It is very durable but "Goes Dead" after a few weeks when it looses tension.
I can assume the synguts and multis are better but the big new thing is poly. The poly strings used to be even stiffer but now they are messing around with the composition and making them a little more elastic.