Think you are getting models confused, Audiocom Superclock 4 is same price on all RAM mods.........the newest Audiocom Ultraclock is more expensive.
I have an Eastsound E5 stock and for the $750 purchase price it sounds great and has nice build quality and stock parts list is impressive at this price. The guys at RAM do mods for Esoteric units and have opportunity to compare sound to other modded units in house like E5. I don't doubt that RAM honestly feel thier fully modded E5 sounds better than stock Esoteric unit, doesn't mean that everyone will agree however.
I have had 4-5 pieces of gear modded by them, I like thier flexibility to work within your budget on almost any type of audio gear.
Also I think someone who buys Eastsound E5 and then has it modded is not the same customer that buys very expensive stock Esoteric CD player, so you may not find someone who has actually owned both