Both at their maximum at the time. (Pre adult DB Goku and Pre Shippuden Sasuke)
No senzu beans
Takes place on random Grassy Flat Land
@taichokage: Of course he would.
Kid Goku destroys him. He is too fast and powerful.
Kid Goku wins this with little difficulty. I'll refer you to the fight between Roshi and Krillin where in a split second they did all kinds of stuff and even had time for a game of rock paper scissors.
Yes, there is that, but then there's also the more impressive feat of Roshi being shown to easily catch the bullets from machine-gun fire, and Goku was giving him a good fight. It wouldn't be exaggerating to say Goku is hypersonic at this point, and I won't even get started on strength/power.
Goku slaughters the Uchiha.
@jazmac: Not an exaggeration at all. You could make this current Sasuke and Goku still wins.
Wait, Sasuke with curse mark as well? If so then Goku.
Sharingan could help follow his movements, as it did against Haku.However, It's Goku's everything that just nukes the debate. You can take your pick with speed, strength, durability, ect (because I can't think of anything additional to that list). He can avoid just about all Sasuke's attacks, and if he didn't then they aren't doing much damage. Goku's massive strength keeps the fight being ended in one blow, two or three being generous.
P.S. I'm going to add skill to that to that list I made.
@DBZ_universe: Yeah he looks cool and his effects are nice to, his first effect is a bit meh (6 counters is alot at first) but his second effect is where he shines imo :) if you have an Spell Counter or Spellbook focussed Deck you are recycling like a beast so the discard is an nonfactor and you can keep killing your opponent.