How to match the length of wire for a symmetrical circuit?
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!