Mark:
That's a great catch on the "H" being tilted to the same side, and differing in relation to the other vertical letters. Since these letters were embroidered on (and not screened/painted) this would certainly increase the chances of it being the same pennant. If the graphics were screened instead, the letter H would be like that on all of them....
Pretty chilling to think it could conceivably be the same one pictured, nearly 100 years later. Of course the year on the Pennant pre-dates the photo (dated 1913), but it's very possible that the pennant was simply retained for a couple of years. That could also explain why the 1910 year portion of the pennant is folded under, and out of view inside the car