Lina, explain difference between tenunan kelantan and terengganu; besides the fact that they are from two different PAS states :) 
Firstly, ehhehe
Terengganu has long been NOT under PAS already. For a long while already they are Barisan National state.
The designs from Kelantan, according to our research and also from the owners of these pondoks is that the designs are influences from Siam, and the intricacies of each designs reflect the court designs of the Siam empire.
Whereas, the Terengganu ones, the designs are Sumatera influenced. Hence the designs reflect those of Majapahit art..
thats the basic ones lah. there are more but its alot of details.. there are songket books available which describes in greater artistic details :)
Hope that helps!