NOT, go here and type in your address, plans differ all around the country.
https://www.agl.com.au/residential/energy/compare-plans
You can compare plans there for your specific address.
Here in SA (also on electricity only, with solar), the Seniors rates were same as normal Value Savers, but there was a $25 sign up discount, that MIGHT actually apply to each quarterly bill.
When I just checked AGL site and it says up to $200 a year discount, so that might be quarterly.
Not long after getting onto Seniors plan, I switched to Night Saver EV plan, so not sure about that rebate.