USB 3.0 external to internal adapter. Which one is right?

My new build is almost flushed out. I just need some clarification about my USB 3 pass through solution.



The case I'm buying comes with two front USB 3 ports utilizing the pass through set up. I found a couple adapters that can be used to plug said ports straight into the mobo internal USB 3.0 connectors.

USB 3.0 A Female to Box Header 20pin Male Adapter

Silverstone 120mm External to Internal 19 pin USB3.0 Adapter Cable


The mobo I'm getting comes with two USB 3 internal connectors. So, should I get two Female to Box Header Male Adapters, or just the one Silverstone Adapter Cable?

Would the Silverstone cable be a bottleneck if both front USB 3 ports where used at the same time?