I have an Ikea chair (it might be the Markus) and an Ikea manual standing desk, although it's been in sitting mode so far. What advantages do you feel you get f

I have an Ikea chair (it might be the Markus) and an Ikea manual standing desk, although it's been in sitting mode so far. What advantages do you feel you get from the more expensive chair. I've been having some muscle issues around the lower back which have been causing a lot of pain so thinking of moving to standing mode, but currently I just get up every 20-30 mins and do some stretching.