Quoted from Dewman:Not a lot different but different enough. I have both and they are both very fun to play. The ZZ top soundtrack on the Getaway drove me nuts because it's so repetitive, but I put in a pin sound system and and changed the soundtrack. Have to say it makes it the Getaway much more enjoyable.
Get a Pinsound and change it up and the game is AWSOME with all new music. I thought the game would pass through my collection quickly and so far it is staying. ColorDmD, pinsound, mountain mod and light mods it is just my favorite game - but I think Pinsound is why. It costs $400 but totally worth it.
I owned High Speed (multiple actually) and it is a great game but getaway (High Speed II) is outstanding.
Look up Mr Tantrums guide to Pinsound and see it in action on Getaway and you will see how it transforms the game.
I love the mix with the Matrix music from the 2nd movie when they are on the highway - the mix uses that in video mode. So cool with the light going off and that music ... my favorite video mode.