Sorry, but Alice can’t be older than Ella. In 7×09, “One Little Tear”, Ella is already a teenager and those episode’s flashbacks take place before 7×07, “Eloise Gardener”, the episode in which Alice was born. Gothel was banished to the tower in 7×09 and escaped in 7×07.
Alice is technically a wish realm character as 7×21 Homecoming has explained (without explaining) that their world is a carbon copy of their ENTIRE world, not just the Enchanted Forest with the appearance of Peter Pan who was from Neverland and who died in February of 2013 in Storybrooke. The Peter Pan we saw was a Wish Realm Peter Pan from a Wish Realm Neverland. I have a post where I have touched on this and how Rapunzel’s story proves they’re from their world as their story was in Henry’s storybook in 7×09, but Gothel, is Wish Realm Gothel, not the real one from their world as her encounter with Nook in 7×07 proves it along with the revelation from Homecoming because if that wasn’t the case then the events in 6×10 would hold no validity as Nook was 31 years older than our Hook.
“Eloise Gardener” and “Knightfall“, (Possibly “One Little Tear” and the opening scene of “Sisterhood“.) all take place after the Evil Queen grants Emma’s wish but before Emma arrives in the the Wish Realm.
Yes her wish created the Wish Realm, which created 31 years worth of history AFTER the curse was going to be cast but wasn’t. The events of 7×09 One Little Tear ARE before the events of 7×07 Eloise Gardener, however, with the wish realm into play creating 31 years of history and with Ella 2.0, Drizzy, Ana and Rapunzel being from their world and not the wish realm and making them around Henry’s age then the only conclusions would be that Alice is not a wish realm character but from their world and she’s 10 years YOUNGER than our Henry and literally 28 years younger than Emma because then you’d factor in the 28 years being frozen in their world and Emma deciding to stay in Storybrooke, making time in their world to resume, also making time in the wish realm to resume, sending Nook to EF 2.0, then that could be a possibility, but as I’ve mentioned, with the Wish Realm being a copy of their entire world and Rapunzel 2.0’s story in Henry’s storybook and there being a copy of EVERYONE, then Alice 2.0, who’s a WISH REALM character as her father is also, and Ella 2.0 being from their world and the wish realm not “existing” until 6×10, on Emma’s 31st birthday, then yes, Alice can be older than Ella. However, with there being a Wish Ella, then that would make Wish Ella older than Alice 2.0 by 14 years, but of course this is just expounding on my theory of the location of EF 2.0 and the the origin of Gothel, if she is a Wish Realm version or a real one based on 7×07.