Duran, the difference is too big for them to be the same.
They differ in appearance and in their mission. Also the one from Revelation 13 gets struck in only one of its 7 heads, while the other in Revelation 17 goes down in abyss entirely.
The beast in Revelation 13 will set up a new financial system, that will require people to get it's mark or name or number to be able to buy or sell. And before that they will make an image of the beast that will both talk and get killed those who refuse to worship it.
While the beast in Revelation 17 will have only one mission, to destroy Babylon the Great.
But you are of course free to believe what you prefer.