On Barnsley, I believe they had already qualified for the cup final. The new manager simply had to oversee one game(?)
On Sunderland we will never know - it can’t be proven either way. Same with ourselves.
I think what Reliant was trying to point out is that Pearson took Leicester so far in the Prem and Ranieri finished the job with Nige’s team and Nige gets kudos on here for ‘building’ the title-winning squad. This was very similar to the LJ situation at Sunderland, except that some use his sacking from there as a stick to beat him with, whilst at the same time holding Pearson in high esteem. Same situation but very different attitudes towards the manager in question.
Some people might suspect a bias against a certain person, based on those stated opinions