Aikido principles learned thoroughly make no differentiation. It's all a matter of when you reach that level of understanding and ability that's all.
There are no different levels of intensity to centre. There are no different levels of intensity to one point. Neither are there to centre line or koshi.
These are just some of the basics involved in Aikido and when you are truly aware of them and can use them as what they are then and only then will you know it makes no difference. In fact the higher the intensity the more interesting and fun to you yet dangerous to the person who thinks they are being more real.
Fighting? Combat? Sparring? All have certain things in common which when recognised are merely the same. The only true enemyto Aikido is self.