Simeone is rather similar to Conte and while I don't think his style of play is negative, it can approach that territory and end up similar to what Mourinho does in the big games. What I would say though is he might be a bit more expansive if he has the players for it. Simeone has tried to make them more attacking this season but it's rather failed as Atletico don't have the right players for it.
As for Pochettino, he does play good football and build good, solid teams but there's a huge question mark over his ability to get his teams perform under real pressure. Spurs cracked under it last season in the title race and similar thing happened again this time around. They also bottled a League Cup final, a straightforward Champions League group, the Europa League tie against Gent and the FA Cup semi-final. And not to mention, Pochettino threw away the cup competitions by rotating his side while at Southampton.