I did have a quick look at this one when the old thread was going, it's pretty certain that she is the one in Chelsea in 1871.
However, it is possible perhaps that Ellen in Australia did not remember her parents names, and just made them up?
There is a death in Chelsea for a 34 yr old Maria Spooner in 2nd Qrt 1872 - ref 1a/159.
Yes, Maria Spooner died in Chelsea workhouse, 24 May 1872.
Ellen was admitted three days later, destitute.
Admission for Maria, age 33, on 24 April 1872. Sick
Daughter Eliza, 7 months, with her.
Eliza also died in the workhouse, 15 August 1872

Birth
SPOONER, ELIZA
Mother's Maiden Surname: RODGERS
GRO Reference: 1871 D Quarter in CHELSEA Volume 01A Page 282
Couple of other Spooner - Ro(d)gers births, including Louisa Mary Ann in 1867. And a baptism for Louisa at Paddington. Father a Labourer. She was 3 on the 1871 census.
I don't see anything for Ellen. No birth registration, no baptism. What happened to her after 1878?
And I'm not sure if there is a marriage for Robert Spooner and Maria!