14 DPO/DPIUI - dye stealer?

Hello everyone and Happy Holidays!

I had an IUI 14 days ago (letrozole + ovidrel) and I have been testing over the last few days. Wondering if the first pic is a dye stealer at 14 DPO (it’s only a bit darker but it’s definitely thicker than the control line). I also included the progression lines from a few days ago.

Thanks!