Tomic looks like he has the better feel for the ball. I'm lovin' Harrison's game though. This guy needs to spend a summer or winter with Gil Reyes like Agassi and Verdasco and he'll be really good.
I don't know if it's just Harrison and Murray or the diff between a youngster and almost-grand-slam champion but the cool with which Murray plays is amazing. I love this about Murray and obviously the other player who does this even better is Federer. Even Djokovic has an element of this when he's playing lesser ranked players. But the ease and calm with which they play is ridiculously awesome. Nothing rushed or labored about their games. I think a big portion of this is anticipation and fitness that allows them to be at the right place with plenty of time - Murray and Djokovic do this with their defensive shots, Roger does it with his offense as well.
That's the kinda imagery I like to have when I am playing. it's one thing to be passionate and fired-up but the kinda cool-ly intimidating response by someone like Murray who can read your ball and return it nice and easy without getting rushed is .. pretty awesome. And it can work wonders at the non-pro level, you'd get pretty far by simply having a unhurried loopy ball deep into the opponent's court and if you had a weapon for when the opportunity presents itself you're golden.
Harrison's forehand is very firm and specific, I don't know how to describe it. I see a bit of Roddick's forehand in it. If I had to describe it I would say Harrison/Roddick hold their racquets very tightly and have their core and below very tight. And Murray would the one holding his racquet fairly loose and a very mobile and lanky lower body, not tense. This is also mainly on the defensive forehands he hits.