I run attacks, pivots and SPX in my quiver. I am of the impression that I have to run my SPX heels a bit higher to avoid over the bars releases. Pivots are a little more of a pain to get in than the others. I don’t really notice any difference in elasticity. I like all of them. I like the BSL adjustability of the attacks and SPXs so I can share skis with family members with different BSLs.
SPX and Attacks seem easier to install and adjust. Forward pressure is a little finicky on pivots. You can get more metal in pivots if you care about that. I have attack and pivot 14s and SPX 12s and the release seems to work fine despite being different levels from the end of the DIN range. I had a pair of skis mounted with demos when I bought them and then switched to pivots and I definitely could tell that difference.
More color choices in attacks. Cooler forza colors maybe for pivots and some SPX.
Remember - and this is important: pick a binding and be an ass about it.