'regular speakers' aka hifi speakers for home use, non specialized as studio monitors are.
My point still stands . . . there are a multitude of 'hifi' speakers, and they will all have their differences. However, 'monitor' is just a fancy word for 'speaker'. It appears to have two main usages:
1 to describe a speaker of a particular type (i.e. one whose specifications make it suitable for high quality recording monitoring), and
2 as a consequence of point 1, as a marketing tool to get you to buy speakers that you think might be suitable for high quality monitoring (whether or not they actually are suitable).
As it happens, high end hifi speakers have the same attributes as high end 'monitors', i.e. they are neutral in their response and reproduce recorded material accurately.
That's were i wanted to go. I bet that very good quality 'regular' speakers are better than worst quality studio monitors.
Well, of course. And the best quality studio monitors are better than the worst quality hifi speakers. I'm not sure that your observation gets us anywhere. However, as I noted above, the tag 'monitor' doesn't always mean what people think it does.
So no one can point one sort as best.
True enough. Assuming by 'sort' you mean whether hifi or monitor, I feel this is a distinction that has been overworked in recent times (and the consequence is point 2 earlier).
We can only mix that what a human's ear can hear. We don't produce our music for dogs with wider hearing ranges. So IMHO if speakers cover that human hearing range there fine.
I think I now what you are getting at, but perhaps you have expressed it a little too simply, because speakers need to do more than "cover that human hearing range". They also need to cover that range accurately, and not have peaks and troughs.
But if you want to hear what you've made then keep the sound 'flat' and NEVER ever use loudness or surround or whatever on your amplifier.
This getting more into consumer territory than recording territory. The loudness switch is used on domestic amplifiers to compensate for the human ear's poor response to bass at low volumes. In studios, the loudness button is not there.