Alice Coltrane is better than John.
You could add the words "in my opinion" if you'd like, and I'm certain that no-one really gives a hootenanny anyway, but it's true - and certainly on her recorded albums.
'Transifiguration', however, is not one of Alice's best. It is a live album, and live albums - Miles' 1970's albums (usually overdubbed and re-Teo'd) and 'Time Fades Away' excepting - are rarely of much use.
The most successful track here - 'Prema' - has an overdubbed string section on it, and is thus, tellingly, the least live recording. The others - well, there are huge moments of spiritual wells - when chasms open up and you forget your earth-bound existence. Mrs Coltrane was good at that. Spiritual enlightenment through music was her forte. But there are also huge moments when the tunes just drag on a bit, and that's not right good, is it?
For lavish, repeatable, prescriptive examples of incredible and odd beauty, see 5 star AC albums 'Journey in Satchidananda', 'Universal Consciousness' & 'World Galaxy'. For 4 & a half star examples see AC albums 'Eternity' & 'Transcendence'. For 4 star examples see 'Lord of Lords' & 'Ptah the El Daoud'. But if a 3 and a half star example will suffice, then start with this.
Alice Coltrane proved her worth above this on many occasions. But I still wish I'd been in that audience. Sigh.