Hegel would likely be the better choice of the two.
A different design emphasis.
MO the Hegel ’sound’ is quite good.
Though I do not have first hand knowledge of the RA 1570.
At 90 db Sensitivity the H80 might work very well for you.
Check out the link for a Review of the H80
https://www.monoandstereo.com/2014/03/hegel-h80-integrated-amplifier-test.html
A different design emphasis.
MO the Hegel ’sound’ is quite good.
Though I do not have first hand knowledge of the RA 1570.
At 90 db Sensitivity the H80 might work very well for you.
Check out the link for a Review of the H80
https://www.monoandstereo.com/2014/03/hegel-h80-integrated-amplifier-test.html