Wycombe Royalandrew1957 Sonko played 23 games for Pompey who conceded 60 goals last season whereas Gardner played 28 for Palace who conceded 69. Sonko actually did ok at pompey last season.
Not quite the true picture.
Gardner played in 27+2 subs for Palace conceding 38 goals.
Sonko played in 20+7 subs for Pompey conceding 46 goals.
Those stats (ignoring all other factors) are strongly in favour of Garnder.
Considering Pompey fans called him Plonko I doubt that he did ok