I would like know if someone can answer this question.
Does bigger/wealthier means huge edge on tech development? IMO even on a simple level this isn´t reasonable - if my neighbour has wonderfull military tech, that knowledge is bound to jump across the frontier - the guy with most money would have an edge but they their neighbours should have an easier time catching up!
An extreme example: imagine that the aztecs beated the europeans in a couple of battles and they got their hands on nice metal guns, nice ships, NICE HORSES
etc. They were bound to learn something and next time the nasty europeans showed up things wouldn´t be as easy 
Does bigger/wealthier means huge edge on tech development? IMO even on a simple level this isn´t reasonable - if my neighbour has wonderfull military tech, that knowledge is bound to jump across the frontier - the guy with most money would have an edge but they their neighbours should have an easier time catching up!
An extreme example: imagine that the aztecs beated the europeans in a couple of battles and they got their hands on nice metal guns, nice ships, NICE HORSES