Both, really. JNT's cosutming choices were notably known for their standardized look. Doctors 4-7 under his tenure basically stuck to one solid look with relatively minor variations (5 changed the design of his sweater once, 6 had different waistcoats and cat pins, 7 changed his coat) while the Doctor prior to that had more significant variations (notably 3 and 4 with several different coats, accessories, etc.). 11 is arguably the Doctor with the most variation in his costumes, with the bow tie and trousers being the only real constants.
I think T Baker has a pretty large change too, at least as much as Smith. In his early years, he has the multi coloured scarf, short red jacket, weird jumper thing, checked shirt, floppy hat, and shoes and sometimes a brown long coat, then the next notable change was not wearing the hat much, plain white shirt with not jumpers and stuff, long grey coat and boots. Then his final costume was white shit with question marked collars, Waist coat, dark red long coat and trousers, dark red and purple scarf, and boots. Quite a big difference. So I'd say Baker's even with Smith.