I expect the 'hockey puck' pistons are for those who want to brag about their low bob weight.

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Some of us on here share information based on past expereinces to help others on here make decisions I order those pistons for a iron headed pump gas motor with those rods and stroke. I hadn't built any other low deck strokers motor from scratch at that time, the pistons are what Ross made for me for that application. When I posted the original dyno results a bunch of the "experts" on here doubted the results without having a clue on what they could do with the same parts, I ended pointed out making 1.19 HP per C.I. on pump gas was no big deal
If you don't experiment and try new things you will always be behind on the HP curve Lead, follow or get out of the WAY