I replaced a pair of Contour S 1.4s with HT2-TLs.
Highs are much more natural sounding with the Salks. The Dyn tweeter had more of a "crisp" or in your face sound, where the Salks tweeters don't really sound like tweeters. Things just sound more like they should, and you hear music instead of a tweeter trying to play music if that makes any sense. If you're considering these speakers for home theater, the Dyn tweeter might have the edge, but for music I much prefer the Salk tweeter. I have the LCY tweeter though, and can't comment on the new RAAL.
I think the mids on the Dyns were a little more punchy, but similar to the highs, the Salks mids are just more natural and transparent. Again, it just depends on what you're listening to as to which will perform better.
Bass - The dyns sound like they are ported. They had a LOT of bass for their size, but I couldn't get rid of the ported sound no matter where I moved them in my room. The Salks sound very linear and smooth.
If you want more of an "in your face" sound, the Dyns are better than Salks. If you want something more natural sounding, I'd go with Salks. One of the main reasons I replaced the Dyns was that they couldn't play quite as loud as I wanted without distortion. I don't think you'll have that issue with the 5.4, and you'd probably be happy with either speaker.