Looks really cool and reminds me of mario kart =D , will you be adding different bear drivers for people to choose from?
Your first bear revision looks more like a beaver but your second looks like a bear, so Id say go with the second one.
Would be cool if later on in development you could add taunts and maybe a mode called create-a-bear where you can create your own custom bear driver using recolor options and maybe even clothing and hair, would be funny to make a bear with a top hat or with a Afro. You could unlock new hair styles, clothing or other body decal options the more you play.
Just my 2 cents, have a great day and keep up the good work.