It is all relaltive isn't it?
Let's see. A Apogee Rosetta A/D/A 24/48 converter goes for about $1300 right now. Remember, that doesn't get you into the computer either. This is just one of the finest sounding A/D/A converters there is.
Compared to the the Lynx One at $450. The Lynx only differs in that is doesn't provide T/DIF I/O, and doesn't have UV-22.
Sounds to me like the Lynx card is actually cheap in comparison considering it uses pretty much the same A/D/A chipset.
When you start stacking up converters on a sound card, as well as all the other NEATO things these things do, something has to give in the price point friend. I am sorry, but Echo does not have a great line in on quality converters that makes it so you can purchase more of them for far less of a price. Things don't work that way in modern electronics. And with the stiff competition in the marketplace, manufactures truely have to offer a product that SOUNDS SUPERIOR to the AVERAGE Joe to get away with charging a much higher price.
So to answer your question, yes, "all for the converters". You don't need to bed Mutt Lange or Puff Daddy to HEAR the difference in A/D/A conversion. And once you start recording a whole bunch of tracks, applying DSP from lousy computer mixing software, throw in some gross inexperience in mixing/mastering, you will really HEAR the difference at the end product between high quality converters and consumer quality converters.
I am not dogging you hear, just trying to illustrate what many before me have discovered, and that which I have heard in my experience, and once I have shared this, others have observed. You CAN hear a difference in converter quality. Good converters ARE expensive. And buy the best you can possibly afford (actually, when I consider a purchase, I always add 25% to what I would LIKE to pay, because I am a cheapskate like everyone, but also a realist that I will have to pay more for quality).
Now, about your question comparing the MOTU to the Layla. Start browsing around some studio websites. You will notice this:
Home type of studios will use the Layla card.
Professional studios will use MOTU products.
MOTU has been in the game for a long time now, and if you are just using spec sheets to make your purchase, I feel sorry for you. Spec sheets can be deceiving. You would have to know HOW the said piece of gear was actually tested to come up with those results. With higher dollar professional products, you can bet that the specs are actually conservative. With something like the Echo products, you will find that the specs are the "best case scenario" specs, and also that they may have used tests that don't reflect real life usage of the product. There are different ways to measure s/n ratio, and it is a pretty good bet that Echo is using the one that will make their product "appear" to be as good as much more expensive products of similar design.
So anyway, this damn soap box is starting to buckle from my weight! Enough! I think I have made my point.
Ed