Used my 10" f/4.6 Hubble mirrored dob. A 5mm Delite for 234x was the most power that could be applied. Visually with no filter could see 2 small white ovals in dark belt above the GRS belt, but no red spots were seen.
Started with my favorite filter the TeleVue planetary. Made the dark belts stand out more but the white ovals were harder to discern. This one blocks a lot of light. Not recommended for scopes under 6".
Next the Baader Moon and Skyglow that works so well on Mars. Everything looked almost as well as with no filter, very little dimming, could barely see the white ovals.
Then tried the light blues 82A&B. The lighter tint A was the best but no white ovals seen. Regular color filters are kind of lame.
Last was the Burgess Planet 30/60 Purple filter, looks like a neutral density filter. Did not dim Jupiter as much as the TV Planet. The white ovals stood out the most with this filter. Looks to be the best Jupiter filter I've ever used.