Unless any of you actually spent any length of time training in silat or kali, then you would'nt know the difference. I talked to Christopher Ricketts before, and he talked about kali of course, and then he mentioned he even tried silat before, and that there are similiarites and differences.
Also, if you talk with Willem DeThouars, he will tell you right away that silat knife and kali knife are different in his eyes.His wife I guess does some filipino knife work,( so i've been told anyway ) and it looks nothing like his.
Victor DeThouars will tell you immediatly that his style of Serak silat, and silat knife work, is very different from filipino kali knife work. Then Victor would procede to tell you why serak knife is better. He's very pro serak silat.There is a knife video that Pak Victor sells on serak knife, but the teacher in the video is also a pekiti tersia teacher. You can see that he is doing pekiti in the tape, as well as serak. When I brought that up to Pak Victor he laughed, and said you noticed that hah? You can see there are differences in the entries. He also said some other things I don't remember. Something about footwork.
You might be right that it would be easier to pick specific styles of each, but I thought most of you would have your own experiences with the arts to talk about your own comparisions.
If any of you are ever able to train in the malaysian styles of silat, you will see that there are some weapons very similar to Filipino weaponry. So some malaysians styles of silat look more similar to Filipino arts the the Indonesians styles do. Malaysian silat and Indonesian silat, their is differences in their weaponry.