I agree Ashdown cabs are not in the same league as the ABM heads
They do the job and seem robust to survive gigging.
There has been so many variations of the Ashdown cabs it’s hard to know which is best
They had the Klyston series ( heavy cabs ) the low cost Mag series, Mag series Deep
Then the ABM series with rear ports and a few variations in handles etc
ABM series today is front ported and is a decent working man’s cabinet who doesn’t mind the weight.
The ABM Pro Neo cabs are smaller in width and sealed cabs and sound very nice but didn’t have the depth of sound compared to the front ported ABM
Never tried the RM series but I’ve read they struggle at high power a bit