I can understand why you'd be concerned, but there really isn't a noticeable difference between those tests. Maybe try a digital (with the weeks indicator) and that might reassure you. However they aren't always completely accurate.
That's a strong line so hopefully all is well. Really hope it's all ok! Good luck
When I got my positive last week the line wasn't as dark as the control line, I tested the next day and tried to compare the lines and they were the same but my second test was definitely stronger within the time frame. I don't think you can compare as I think the tests continue to develop after the time frame.
I did a digital the following day but haven't done the second one although I probably could today and it would hopefully show progression. I've decided not to continue testing as it will make me anxious.