As written, unless you have another Button class that is not the regular Lemur Button then the result is the same either way… and if you DO have your own Button class then you could always put that instanceof check first in the elseif chain.
…and if value is a string then it won’t pass any of those instance checks.
(And I reiterate that it’s really weird to put UI components in your list model instead of model objects… it’s like putting ViewportPanels in your database.)