4-HO is where its at for me personally. 4-ACO seems like the more hardcore trip's, akin to Psylocybine. 4-HO's are recreational.
for me its the other way round. the acetyl ester seems to mask the profoundness and harshness of the underlying 4ho compound. ive had 4aco-dipt, 4aco-det, 4aco-met and 4aco-mipt so far and they all where great, preference in that order.