My educated guess would be there is not really more or less bass from the amplifiers themselves, Violectric vs Burson in this case. It's how the headphones, Arya Stealth or any other, are being driven... plus the differences in DACs of course.
Sincerely the Burson amps are reputed to be "different" especially in the bass region. It's a matter of how the headphone drivers are being controlled by the amp. Burson always felt to my ears it let the headphones go wild quite a bit, think loose, out of head, ethereal bass, but also the rest of the spectrum as well. Violectric on the other hand is very much a control "freak".
But the big difference in bass quantity per se is just not there, especially with flat impedance drivers such as the planar drivers in the Arya Stealth or any other orthodynamic aka isodynamic aka planar headphone.
p.s.
@jjazzy I'm curious to know what music tracks made You feel that way on the Violectric, vs the Burson?