Question about dark transfers

[karajeboo]

I see a lot of people use the dark transfer sheets for everything. I only used them for dark shirts, and I didn't like it as well, but if it will turn out better and last longer, I may try on my white shirts too. Question: If will I need to cut out around the design more closely than if I used the light transfer sheets? I had a heck of a time trying to do a transfer onto a dark pink shirt, because the transfer paper is white, so I had to crop so closely to the design, that it all fell apart. But if it's going on a white shirt???