I think the question is worded to mean compare Nintendo, who seem content to be the sole provider of software for their hardware while the rest of the market seems to be oblivious to it, to A-Eon, which, well, I think we understand now.
I think A-Eon may be trying to be a sole-provider for the Amiga but with the intention of drawing more development to the platform, the difference is that with Nintendo, like them or loathe them, they generally make the best truest to form videogames out there, and if you don't believe me, trust that nearly all game developers who are truly gamers will own and play Nintendo games, the problem for third parties when it comes to Nintendo is that the 1st party competition is so stiff, and add to the fact that most gamers would buy more than one console, and usually a Nintendo console for just the 1st party stuff, they (the 3rd Party) developers can ignore the Nintendo market completely, reasonably safe in the knowledge that a gamer who has an Xbox-One or PS4 as well as a WiiU will pick it up on the other system, and therefore they won't have to direct funds to create it for the WiiU. Then the clueless look at Nintendo as irrelevant while the big N still rakes in wads of cash from their sales of first party games that have a huge attachment rate compared to that of the competition.
So, it's a bit early to consider A-Eon and Nintendo in the same way, as Nintendo are raking it in (even while people think that they're doing badly, check the numbers folks), and that part of it A-Eon has yet to establish. The only thing in common being sidelined to different degrees by the 'mainstream'.
Also remember, for the UK folks, the Spectrum was a dismal failure everywhere barring the UK and small segments of Europe, the late 80s Eastern Bloc boom notwithstanding (as good as that was) as I'm talking about commercial success.
Also, the NES was originally released in Japan in 1983, not too shabby hardware for that time. The C64 hardware was better in some ways, but Nintendo designed it from the ground up for the type of games they wanted on there and it did a stellar job. There is a reason that Ultimate/Rare went from the Spectrum to the NES rather than the C64, for which all their releases were contract jobs.
