Change tile row number for ONE list of Promoted Links

I’m currently working on a corporate SharePoint site, where I have on a homepage multiple lists of Promoted Links. I’d like to set the row length of just one of these lists to 2 tiles, which I can do by embedding code to limit length to 320px. However, this has the effect of limiting ALL of the promoted link lists to rows of 2. How can I restrict the code to affecting only one of the lists? Thanks