Aside from the differences in loft, are the TS3.5 and XC3 iron heads the same dimensions?

I was at DSG yesterday comparing the XC2 and XC3 irons, and I noticed that the sole of the XC3 did not appear much thicker than the XC2 when they were held side by side. However, when I look at photos of the TS3 and TS3.5 heads online, the sole of the TS3.5 appears significantly thicker than that of the TS3. Is that actually the case, or is it just how they appear in the photos?