Well, I had the signature of the Ietada verified and the comment was that the lines were not 'crisp' (meaning more swept lines) and since the signature seems to lacking a couple of characters it was probably from a later date than the Ietada 1. More probably towards the end of the Edo.
The Iesada was seen as actually being from the 17th century.
Both are similar in construction.
The matching menpo was what the seller said. Fwiw I guess.
Hereby the photo's of the signature. First one is Iesada, second the Ietada