For those interested (TG-16 was my first ever console, so the nostalgia alone made this a must for me), the PC Engine Mini variant differs from the CoreGrafx and TG-16 Minis in two important ways:
1) It comes with Tokemeki Memorial (a Japanese language dating sim) INSTEAD of Salamander
2) The controller it comes with does not have the turbo switches, but you can buy additional controllers that come with them.