That Ronstadt version is much weaker than the original and that thin, metallic reverb doesn't help. There was a fashion for swamping things in that kind of reverb at the time though, not just voices but acoustic instruments as well. It's meant to make things sound "bigger", but unless done very carefully wipes out all the gaps and transients that are necessary for rythm.
That a re-done version is a bit lacking compared with Spector's arrangement and production isn't surprising. If there were two producers in the early 60s who really pushed the envelope with what you could do in a studio and looked for creative ways to use all kinds of new effects, processing and using the technology as an instrument it has to be Spector in the US and Joe Meek in the UK.
Both geniuses and both quite mad.
Now, if you want loads of reverb used appropriately, I give you the inventor of loud, Mr Dick Dale.
https://m.youtube.com/watch?v=lRH_70_Foow