The standard was built to a price point.
The deluxe has upgraded components, which really make a difference, but were too costly for the targeted standard price point.
In my mind this is somewhat a moot point.
SMC audio, Steve M's new company offers DNA upgrades which take the amps far beyond the difference between std and upgrade. I'd buy the most cost effective (std or delux) and when funds allowed, upgrade.
The deluxe has upgraded components, which really make a difference, but were too costly for the targeted standard price point.
In my mind this is somewhat a moot point.
SMC audio, Steve M's new company offers DNA upgrades which take the amps far beyond the difference between std and upgrade. I'd buy the most cost effective (std or delux) and when funds allowed, upgrade.