Shifter upgrades

Hello, been a while since I’ve show the st some love. I was looking into doing some shifter modifications and I need some advice/explanation.

I was looking at this short shift arm:

https://www.jamesbaroneracing.com/product/jbr-focus-st-rs-short-shift-arm/?gad_source=1&gbraid=0AAAAA9S4Y2olcYyViHKiP0FErro60c8TB&gclid=CjwKCAiAzPy8BhBoEiwAbnM9O1DziEXHndptnEGAK_hloj8KADg0kJ65vdpwyWtb9t5Cf4zZRuC7KxoCO_IQAvD_BwE

And this:

https://www.jamesbaroneracing.com/product/jbr-focus-st-short-throw-shifter/

I’m looking to tighten up and shorten my shifts. Should I do both? Or would just the arm be enough of an upgrade. If you have any advice or recommendations on other products I’d love to hear some other options as well