You can copy the sound to another track, but the macro settings affect the sound settings (filter is almost closed in trk sound). This means you have to do the tweaking on the synth-pages themselves, which make you lose the performance knobs that have a similar range to the 303 knobs.
Dual 303 kit
Another option is to change the macro to accommodate two 303’s:
https://www.elektronauts.com/files/425
Have fun.