Hydro Thunder Hurricane or Riptide GP2

[tdasw97]

My Surface RT should arrive this week and I'm not sure which game should I buy Hydro Thunder Hurricane ($4.99 on sale) or Riptide GP2 ($2.99). Did someone play both on a Surface? Which one should I get?

 

[Nokia Boy]

Why not both?
I think hydro thunder is better,but take a look for gameplays or try the trial versions (if they are available)