What kind of sauce do you put?!
Answers:
Some people like chickpeas on top, some like ketchup, imli chutni...btw it taste good with imli chutni...I hope u know wat imli is:P ya plum sauce is ok...some ppl top it with a little bit of plain yogurt and chickpeas with a little spice on top..try it:)
Tamarind sauce seems to be the most popular at least in my region. Of the things you listed, I guess it would be closer to the mild sweetness of plum sauce but they flavors are not the same. It's very good.
However, mint sauce is KING with me. I really did not think I would like it but the tangy flavor won me over immediately. It has gone from just something to dip the samosas in, but I'm actually scooping at this point lol.
I prefer the cilantro chutney, with some of the spicy pepper sauce.