Fasthen65,
Yes, the evo300 sounded better than the sq150 for sure especially in the low end. The bonus being the evo300 can have various tubes swapped out to get the sound we want. Can’t do that with the sq150.
For myself and family, the evo300 sounds great that’s the most important thing as I want my 5 and 7 lye old to appreciate all types of music.
The 590 gave the best overall sound (low to highs) without doing anything! Basically plug and play. I hope this helps out.