Question about Flapper for Toto Ultimate

I am new to the site here, but have learned quite a bit since I've been lurking! I am hoping someone can help me out: We have a Toto Ultramax 1.6toilet, but it does not have the red flapper that is described here: it has a pale green flapper with a large "spoiler" or perhaps a counter weight opposite the hinge side. Is this an older style flapper that I can replace with the red one that Lowes carries, or must I get the same type that's on it now? The paperwork that came with the toilet says that it's a model MS853113.

Thanks in advance!

Kent

The MS853113 is a regular bowl Ultimate.

The Ultimate used the "spoiler" to slow the flapper down.
The correct replacement is the Blue Flapper.

The MS853113S uses the red flapper.


Toto Ultimate with Blue flapper.