Having had both I can honestly say I only miss the smell of the leather, I don't miss the cold feel as even with heated seats they took a while to warm up, I don't miss the worry of scuffing the drivers seat bolster every time I climbed in and out, even after 8k miles mine had started to show signs of marking, and I was very careful also thought it's overpriced for the quality it was.
I do think leather looks much better than the cloth in the R32, but in the GTi I wouldn’t hesitate to have cloth Tartan, as it looks very befitting for the overall look and feel of a GTi.