They are NOT the same boat. the 357 is a late 80's to maybe an early 90's boat. It is a real 35'7" withOUT the swim platform. Not a very fast boat, but talk about ride. Has a good size cockpit too.
Don't know much about the 353, but I think it includes the swim platform, therefore is considerably smaller than the 357.
Either way, you will get a heck of a boat.