Agree with Paul,
I have always thought the NBA had the best superstar players, and those superstars eg LeBron, KD, are the best players in the world.
Then after that, the top Euroleague guys, eg the top say 8 guys from the top Euroleague teams would be just as good as most NBA rotation guys and could easily be say anything from the 3rd or 4th best to 9th best on most NBA teams, as a whole not many of the Euroleague guys would be NBA superstars (eg LeBron/KD level) but over time you would get some who would make all star teams, actually possibly quite a few, and the occasional one would be a super star but in general they would be very good players, just not superstars.
Alot of the Euroleague top players have better skills, eg shooting than alot of the the NBA guys who rely more on athleticism. Some of the Euroleague big guys look better than the NBA guys in terms of skills aswell.
I'd love to see the top 4 Euroleague teams join the NBA for a season, see how they go in propper games, i actually reckon they would do quite well, wouldnt rule out a playoff birth either.
I personally rank the leagues something like this
3. Other combined Euro leagues - VTB league
4. Stronger Euro leagues - Spanish ACB/Italian Series A, etc
5. NBL/French Pro A/ D-League, various other Euro leagues.
6. NCAA/NZ NBL/SEABL/CBA/other leagues not quite as strong as above groups eg Sweden, French/Italian div 2, etc
I think the NCAA is actually one of the harder leagues to rank, have some absolute guns, but i still rate it overall below the NBL, possibly somewhere between the NBL and say the NZ NBL.
So yea, i think the best players as a whole are in the NBA, but apart from them there wouldnt be much in it between a NBA player and a player playing Euorleague/various other leagues around the world. Just because a guy has played NBA or is in the NBA doesnt make them better than a good Euroleague player, or a top player from various other leagues. Eg Johnny Flynn/Cedric Jackson wouldnt be any worse than some guys on NBA rosters and are probably better than some, just dont have the special skill, reputation,attitude, game style that the clubs/coaches they have been involved with want to stick in with the NBA, and there is so much competition for spots some clubs would have never looked at them, but they would be on par with heaps of guys as all round players. I think a decent comparison is was Patty Mills a level above Cedric Jackson? For me from what i saw, no, in fact you could argue Cedric is better, but Mills is in the NBA, albeit not huge minutes and Cedric has played NBL and now in the Euroleague. Could also compare Cedric to Flynn, who at one stage started in the NBA, albeit for a weak team.
There are many examples of this around the world, just shows apart from the superstars and depth of talent on the good NBA teams, there isnt much difference between a NBA player and a top player playing around the world.