i recently switched to triangle with refillable clear cartridges transferring the factory chip to the clears. ...am about to get the permanent chips for the set up.
the triangle ink is superior to the SS2. it has a bit more retarder in it, i've noticed a pronounced reduction in issues like the faint rings of dried ink that dries around the bottom of the heads, the surround of the heads is cleaner, the whole machine seems to be easier to maintain.
the color is better. the yellow is the best difference. it is a true process yellow rather than a dye/gold. your prints will reach better limes and purer yellows. the magenta is better too. almost a hot pink red. making true red less elusive of a color to hit.
as far as scratch resistance. they seem to be the same. very tough and very good adhesion just as the SS2 provided.
i can't imagine going back to opaque cartridges, bleeding high costs (ink is no longer this precious expensive fluid), a more finicky printer, and duller color. if you consider, an ink company has one thing to do. make ink. eat sleep and breath INK. ink ink ink..... ink. that's all they think about every day. INK. there's no way the guys at mimaki or any other printer manufacturer are as obsessed.