Shooting: Probably Brady
Passing: Matt
Hands: draw
Hockey sense: Matt
Skating: Brady
That's trying to compare them at the same age. Until the NHL, Matt always had linemates who were arguably the best players in their respective leagues or tournaments (Matthews at USNTDP and Marner/Dvorak in London) that made him an absolute monster. Brady has never really had linemates at that level (and might never), therefore he has been asked to be much more of a driver of his teams offense.
As for Svechnikov vs Brady? I mean, crazier things have happened than Brady Tkachuk ending up the better player, but I believe it is unlikely. Andrei Svechnikov is a rare offensive talent where everything in his offensive toolbox grades out as very good to elite which is quite rare. Only guys who really have done that recently are Eichel and Matthews. Not that those two are the best, it's just that they had incredibly well rounded offensive games where nothing could be labeled average. McDavid it was his shot, but his unreal skating ability and ability to control the puck and think the game as fast as he played it has made him the best prospect since Sid. For Tavares, it was his skating, Laine was knocked for acceleration and overall skating, Marner/Kane people questioned size and strength on the puck, etc. Brady is a really good prospect, but he isn't a great skater and has a less diverse game. I'm not sure Brady Tkachuk is a guy you build your franchise around, but he's absolutely a guy who can be key to winning with and be a core piece. Svechnikov has all the tools to be a top 5 offensive player in the game and the best Russian drafted since 2004.
In all honesty, I'd think Brady is battling more with Zadina and Farabee for 2nd winger off the board, more than with Svechnikov. Either way, if you want a high-end winger or are in need of a defender this is the draft for you.