Naruto is from the Namikaze and Uzumaki clan and Hashirama is from the Senju clan. Genetics still play a role in how they look. None of the senju really look alike though tbh, I found that the strangest. There are more Uchiha that look like, noticeably for the females the sharp eye lash that looks like heavy mascara and long hair and for the guys at some point long hair. For example even Obito had long hair that resembled Madara's hair. The hair is usually long and spiky or medium length and well kept as in Itachi and Sasuke's case. There are a few exceptions such as Shisui but he may just keep cutting his hair who knows. Obito sure dis, perhaps if Naruto was from the senju clan he may have looked more like Hashirama afterall their oersinalities are actually extremely similar as noted by Tobirama. So we can say that Madara and Sasuke look alike from their indra heritage (minus the long hair on Sasuke's part) but they have differing ideals. Naruto and Hashirama look different but have similar if not the sane ideals dye to their Ashura heritage so there's that.