That's the best part. More options at different price points for different features. The only option for me until the Eco-w came out was the Rogue 30a at over $300. The MS 15a was $200 for too small.
The biggest reason I went with the Morningstar TS-MPPT-60 for my mounted system was for it's TC and custom settings. Not for normal camping, the Eco-w's were fine for that. I was worried about being in storage where the bank would see -20 and over 100 every year. Sadly the only thing that isn't adjustable is the temperature compensation and it doesn't agree with Lifeline in extreme temperatures. So every year I will have to go out and either manually set a float or disconnect the bank for the duration of the extreme weather. Just like I'd have to do with the Eco-worthy. Go figure.
BFL
Since you have used them side by side, does a PWM controller put out the same heat as a MPPT? Both the Eco-w's and the MS can really put out some heat operating at the upper ends all day long.