Here is the original image shown on the shirt from Cafepress.
Here is a scan on the actual shirt from Cafepress. The colors are slightly duller and there is a noticeable white outline around the image. Click the image for a larger closeup. Same Cafepress shirt after being washed about six times. Image has held up well and I think the white outline is slightly less noticeable. Click the image for a larger closeup.
Cafepress dark shirt Cafepress dark shirt
A scan of the shirt form Printfection. The white outline is much less noticeable, but the colors are even more washed out than on the shirt from Cafepress. Click for a larger image. Printfection shirt after being washed six times. Seems like the ink might be prone to flaking off, there is a noticeable change from the before scan. Click for a larger image.
Printfection dark shirt Printfection dark shirt
Here's the shirt from Zazzle. Zazzle's shirt also has the white outline, but I love the color reproduction. Click for a larger closeup. The Zazzle shirt held up great, white outline is still present. Click for a closup.
Zazzle dark shirt Zazzle dark shirt
Last but not least, the shirt from Spreadshirt. Color is not quite accurate and if you look at the closeup you will see there is a slight black outline where the image was cut. The Spreadshirt shirt looks like it might have cracking issues, I've circled them in the closeup. Not that it's relevant anymore since Spreadshirt has switched to direct printing.
Spreadshirt dark Shirt Spreadshirt dark Shirt