Do I get more usage or better rates with Business mode?

I’m looking at ‘upgrading’ to Business mode.

Does the switch from $20 to $40 increase the usage amounts I get for each user? At the moment, most of my users are 4x’ing their allowance so I’m spending about $80/100 a month per user.

You can enable usage-based pricing on the website allowing you to pay for extra fast requests beyond your plan limits.

I understand that. What I’m wanting to know is does the increased cost of the Business Plan get us more usage by default, before we start paying overages?