Hi
@Charlie33
My opinion for what it's worth.
Both my hips were very bad apparently (one slightly worse than the other) and I wish I had known so I didn't spend those last 2 years pre-op So miserable...but I'm very glad that I had both done at once as, indeed, I believe it would've been impossible to get things right until both were done.
My bad hips caused horrible lower back pain and SI pain, not so much HIP pain, really just decreased ROM.
The doctors investigated my back without considering my hips, hence the delay in the diagnosis.
After BTHR, it took some targeted PT at 2-3 months to relieve the SI issue due to Pelvic tilt and hip flexor issues which affect the pelvis.
I don't think waiting will help anything...waiting until all the cartilage is gone so you HAVE to have a replacement (all the while being unable to recover properly from #1 due to posture/gait from bad hip) on top of the 2 surgeons agreement that it will take getting the other hip on board to get things right seems unhelpful.
I did not have computer guided surgery but several member here have to great success.
Again, only my opinion...
if the surgeon who did #1 still has your confidence, and doesn't deem the other THR unusual or complicated... perhaps I'd be inclined to stick with him...
However if you feel #2 will give you an advantage for alignment, I might would give it a hard look also.
If you are healthy otherwise and up for doubling down, then I say... do it sooner than later.