Sorry, I wouldn't be able to comment with any degree of certainty because I heard them at different times with different speakers and equipment etc.
I suspect that any differences in tonal balance result from the differing release dates (I think they were released maybe a year apart??) and the latter (which I think was Elex-R and Brio-R, versus Ellicit-R) incorporating some additional knowhow that Rega attained over that year. But that is just a guess, and I could be off on the dates. Haven't looked at for quite awhile.
I suspect that any differences in tonal balance result from the differing release dates (I think they were released maybe a year apart??) and the latter (which I think was Elex-R and Brio-R, versus Ellicit-R) incorporating some additional knowhow that Rega attained over that year. But that is just a guess, and I could be off on the dates. Haven't looked at for quite awhile.