Waton,
This is not about the means of transportation both used; but subjects of vital and primary importance such as existence of God, soul, definition of ego …etc. There are even times when Jesus did not know the answer to the simple question put to him, yet gave an answer that dishonored God. (John 9:1-3). Then there are cases of comparing pagans with dogs, glorifying slavery (Mathew 24:45) etc. Regarding walking over water and other miracles he supposedly performed—did he really perform them? If so, a disturbing question would arise: Why did the witnesses and beneficiaries of those miracles not put up a corresponding response such as coming in support of him when he was subjected to a mockery of trial, taking up preaching work even after his death …. etc.