Answer by taking a quote from the following article:

Herbert Sutcliffe (24 November 1894 - 22 January 1978) was an English professional cricketer who represented Yorkshire and England as an opening batsman. Apart from one match in 1945, his first-class career spanned the period between the two world wars. His first-class debut was delayed by the First World War until 1919 and his career was effectively terminated in August 1939 when he was called up for military service in the imminent Second World War. He was the first cricketer to score 16 centuries in Test match cricket.

Sutcliffe and Len Hutton opened the Yorkshire innings in one championship match in 1934 and then, with Sutcliffe's Test career ending the following year, became the regular Yorkshire pairing until 1939 when the outbreak of war effectively ended Sutcliffe's career.  Especially given that he was from Pudsey, Hutton was often portrayed as Sutcliffe's protege but Hutton maintained that it was the coaching of George Hirst that did most to develop his career. He said of Sutcliffe: "You do learn a lot from watching a player of Herbert's class. It was an enriching and invaluable experience to bat with him". Sutcliffe's view of Hutton was that he was "a marvel - the discovery of a generation". Hutton said that his shyness and the fact that he was twenty years younger than Sutcliffe made it difficult for him to approach his partner when he needed help, which he more readily got from Bill Bowes and Hedley Verity. About Sutcliffe he said: "I did not find it easy to talk to him".  The master-apprentice relationship changed after Hutton scored a world record 364 for England against Australia at The Oval in 1938. Future Yorkshire captain Ronnie Burnet reckoned that Sutcliffe had been the dominant partner until then and their scores would be something like 60 to 40 in Sutcliffe's favour. After Hutton made his record, his confidence increased and Burnet said the ratio was reversed "to 70:30 in Len's favour". Burnet said that Hutton was "tearing attacks apart in 1939 and Herbert was by then playing second fiddle".  Comparisons of the two Pudsey masters have been inevitable but there were essential differences in style. Bill Bowes said that Sutcliffe readily acknowledged the superior ability of Jack Hobbs, Wally Hammond and Len Hutton but what Sutcliffe did have were the concentration and willpower to make the best of his abilities in any given situation. Hutton pinpointed the key difference by explaining that, when Sutcliffe was taking guard, "his weight was on the (front) left foot, enabling him to play the hook shot so well" whereas Hutton put his weight onto his (back) right foot. Hence Sutcliffe more easily moved back while Hutton developed a forward style. Another view, expressed by Sutcliffe's son Billy, who also played with Hutton for Yorkshire, was that Sutcliffe was "probably better in a crisis", as his numerous successes on bad or "sticky" wickets would suggest.  Sutcliffe and Hutton made 16 century opening partnerships together, 15 of them for Yorkshire. Their highest was 315, which they achieved twice.

What did Hutton think about Sutcliffe?
You do learn a lot from watching a player of Herbert's class. It was an enriching and invaluable experience to bat with him