Inconsistent printing results using same settings but different calibration models
First of all, I would try printing a little bit hotter, let's say arround 210&nbsp;&deg;C. Secondly, due to how the X and Y letters are being printed in the sides of the cube I would suggest to tigthen both the X and Y belts.

Regarding the gaps, I would first try a flow rate test. You could use a cube like this one.

Using: 


extrusion multiplier = 1
layer height: 0.2&nbsp;mm; 
layer width= 0.4&nbsp;mm ; 
wall count= 2. 


Then measure the walls with a caliper and you should have 0.8&nbsp;mm walls. Do a couple of measurements, get the average and divide  0.8 by it  and multiply by a 100 (100*0.8/average). That's your new flow rate.

I would also try to add 1 or 2 top layers to the print.

For the first layer, I would definitely get a glass bed and use hairspray. The bottom of the pyramid doesn't seem to be sticking well. Apart from this, I'm not really fan of using Z-offset. Just try leveling a couple of times manually with a paper to get it right.