The different floor will affect the historical example of the plan.
From 226.5b(d)(12)
(xi) An historical example, based on a $10,000 extension of credit, illustrating how annual percentage rates and payments would have been affected by index value changes implemented according to the terms of the plan. The historical example shall be based on the most recent 15 years of index values (selected for the same time period each year) and shall reflect all significant plan terms, such as negative amortization, rate carryover, rate discounts, and rate and payment limitations, that would have been affected by the index movement during the period.
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The opinions expressed are mine and they are not to be taken as legal advice.