The newer flat blade type do have the holes set slightly higher than the lines on the older type.
Basically the upper hole (which is only about 1 - 2mm diameter) is formed to one side of the line of the other rather than being central. The lower hole is also a little higher.
It is however a rather pointless and pedantic topic because oil level is not a precise measurement. It can’t be, it will never be and it doesn’t have to be. E.G:
Which side of the hole do you aim for or spend two days getting it dead central?
Did you get a spirit level out and check the ground was perfectly level before checking your oil after leaving the car standing for the exact prescribed amount of time?
I would think not.
So the pedantic armchair forum expert would say well you did it wrong then.
The normal person would say if you did, then you need to see a doctor.
To sum up:
Yes it’s slightly interesting that Mazda raised the levels by approx 2 - 3mm.
Compare this info to the thread where someone is worrying he has a slight overfill, but hasn’t said by how much.
Slop some in and if it’s round about where it should be then smile. Drop the hood and go for a drive.
There are far more pressing matters to be concerned about.
Have a good day 
