Considering upgrading to Ultra due to Opus 4.5 limits. Is the quota gap significant?

I’ve been seeing a lot of posts lately about Opus 4.5 usage limit issues on the Pro plan. Does anyone know exactly how much more quota Ultra plan users get for Opus 4.5 in Antigravity? If exact numbers aren’t available, could someone give me a rough ratio or even just a general sense of how much more headroom there is compared to Pro?