The specs for the 2013 Toyota Venza and the 2013 Lexus RX350 are NOT the same: The Toyota Venza and Lexus both have a 3.5 liter V-6; but the Toyota engine is rated at slightly less horspower and gets slightly better fuel economy.
The Lexus has a 19.2 gallon fuel tank; while the Toyota has a 17.7 gallon tank.
The Lexus has larger wheels and lower profile tires than the Toyota.
The Lexus has a 4 year, 50,000 mile basic warranty; while the Toyota has a 3 year, 36,000 mile basic warranty.
The Lexus has a 6 year, 70,000 mile drivetrain warranty; while the Toyota has a 5 year, 60,000 mile warranty.
The Lexus has a 66.7 inch overall height; while the Toyota has a 63.4 inch overall height.
The Lexus has a 107.9 inch wheelbase; while the Toyota has a 109.3 inch wheelbase.
The Lexus has a gross weight of 5560 lbs, and a curb weight of 4178 lbs.
The Toyota has a gross weight of 5095 lbs, and a curb weight of 3870 lbs.
The Lexus has a maximum cargo capacity of 80.3 cu.ft; the Toyota's is 70.2 cu.ft.
The Lexus has a cargo capacity with all seats in place of 40.0 cu.ft; the Toyota has 36.2 cu.ft.
The Lexus has about 3 inches more front leg room, and 2 inches less rear leg room than Toyota.
The Lexus typically has more sound insulation and better suspension than the Toyota. These 2 vehicles are obviously carefully designed to have differences which appeal to a different market segment. The $10,000 price difference is not a marketing ploy; there are very real and significant differences between these vehicles.
Here is a link to the actual differences: