Dead giveaway in the signature

Formulation of capital B could not be more different

On left it begins high above baseline with straight downstroke, then pen lifts and travels high left to begin unconnected stroke remainder

On right it BEGINS ON BASELINE, then entire character is constructed of single multi-curving stroke.

These are two conceptualizations of how to form the letter that are completely alien to one another. The odds of an adult suddenly changing so fundamentally the way they think of writing their own initial are probably near zero. Safe to say two different people wrote these signatures.