YES it is the same gravity. It took me a few seconds to google "what causes the oceans tides" to get the official science answer that it is gravity.
The point is clear, that gravity for modern science is the cause of the oceans tides. Perhaps not to geo-centrists like you, but nobody cares about geocentrists anymore. No one ever did really.
The phenomenon we call GRAVITY and theories that cause gravity are two different concepts Kiwiboy. Yes Google, combining the two as one, gives us a theory for the tides that I, like you, do not accept. For instance I have seen the moon and sun above me at the seaside with the tides fully out. For all we know the angels could be controlling the tides as St Thomas said they were controlling the rotating sun, moon and stars.
As regards the subject of geocentrism, well it is not true to say no one ever cared about that order. It was only after 1835 when Rome conceded to a heliocentric order that the human race ceased to care, which I suspect you mean. There is not one single history book on the Catholic Faith and on science that does not record the time when geocentrism was considered by all to be the order of the universe and how both churchmen and science abandoned such a CREATION.
But things are changing and the subject is now being revisited. Not because of the subject matter, for that does not affect any human being, but because it is now known that the reasons given for the abandonment of geocentrism by both Church and State no longer holds up. The secularised world cannot allow this to be known because a geocentric order can only be explained by way of a divine Creator, and the churchmen of Rome and the world cannot allow it either because it means they abandoned a papal decree and embraced a heresy on the basis of false science.