Differential Pair Routing PCB
When routing USB 3 signals, the strongest rule is &quot;length of the traces&quot;.


On this picture I can't use narrower traces (I would need 0.10 mm
width trace to put the trace between pads) so the number of vias is
not equal for these two lines. Should I to create 2 vias to change the
layer and matching the length for the two layers?

0.1 mm (4 mils) trace width is fine. That's not going to pump up the PCB price.
Yet, shrink by 1 mil the width of the 2 pads of the connector, don't create vias, and route the signal between the 2 pads of the connector.
At the end, match the traces length.