Novation Twitch TRS to RCA?

Hello !

I mix in a bar where i have to plug my controller into a mixer. The inputs of that mixer are RCA.

I've always used the Booth Output of my twitch (RCA) with is a standard RCA to RCA cable. However, i was wondering if that would be any better to use my master output instead (which is 1/4' TRS L & R)

So my questions are :

1. Would it be better, or louder, if i used the master outputs?
2. Even if you don't believe i should use the master output, how can i hook up TRS to RCA? All i see on the internet are one TRS to red & white RCA cables. I was wondering if there was such thing as two TRS to red & white RCA cables, as i have two (Left & right) TRS outputs. Or maybe i only need to plug a one TRS to red & white RCA cable into either the left or right TRS output and it'll be fine ?

Thanks a lot for your time