When I say “extremely close” I mean it. From the Wiki link I provided:
Solar Pons has prodigious powers of observation and deduction, and can astound his companions by telling them minute details about people he has only just met, details that he proves to have deduced in seconds of observation. Where Holmes’s stories are narrated by his companion Dr. Watson, the Pons stories are narrated by Dr. Lyndon Parker; in the Pons stories, he and Parker share lodgings not at 221B Baker Street but at 7B Praed Street, where their landlady is not Mrs. Hudson but Mrs. Johnson. Whereas Sherlock Holmes has an elder brother Mycroft Holmes of even greater gifts, Solar Pons has a brother Bancroft to fill the same role. Like Holmes, Pons is physically slender and smokes a pipe filled with “abominable shag”.