Bluemike,
I have not had the chance to compare the two directly so will rely on memory.
I replaced the stellavox with the goldmund 18.4 monos and felt they (18.4's) were better in every parameter...except price (the stella's, like the TRL, are value champs imho)
I think the quality of sound with the trl and the 18.4's are very similar...quiet, fast, dynamic, neutral, powerful.
The goldmund fit and finish was superb where the trl is ok.. by high end standards
The trl is 30% the cost of the goldmund so on the value scale the trl is the clear winner.
I am using the Dartzeel now and like it better than the trl but again on the value scale there is no comparison.