I was told that the two wires (R+ and R-) should keep the same length to make a symmetrical circuit. To do that, the designer put some turns on the layout. It looks weird to me, but wondering if this is a common practice. The frequency in the circuit is up to 1.5GHz.
1.5 GHz has a wavelength of 20 cm and a golden rule is not to worry too much if there is a line mismatch of less than one tenth of this. That's 2 cm and maybe if the signal were a sq wave you'd be keen to reduce this by another factor of 5 or 7 to account for significant harmonics in the waveform.
So maybe mm precision is needed. You decide!