On gamefaqs.com there's a translation guide for Battle Gear 3
I don't think you'll really need a translation guide for Touge 3. I don't remember how much of the menus were in Japanese but I was able to play through it without much trouble. Just go through trial and error and you'll figure out the menu options eventually
Probably Battle Gear 3. It's more fun I guess... but I don't play it much. BG3 has a pretty big fan base though. There's also an arcade version of it and Battle Gear 4 will be out in a few months.
Battle Gear 3 !
I also have both games. Battle Gear is awesome ! The great cockpit view and the perfect handling is just 100% fun. The replay value is the only problem; put in a Kaido Battle structure and I would say that this game would beat almost every racing game in the western hemisphere...
Touge 3 is solid, not more....
That is my opinion......