the IS200 has a six speed manual box, as does the altezza.
the engines are different tho, the IS200 has a 1G-FE 2.0ltr in line 6 lump, and the altezza has a 2.0ltr 4 pot.
power wise, the 'tezza pushes about 210bhp, and the IS200 pushes about 153bhp.
Basically, the cars are identical, apart from the engine!
Stu