Well, I can't be of any help with this comparison. I can tell you that I recently put a Calypso up against my BAT vk50se. At first I was not impressed with the Calypso. It just didn't have the deep, wide soundstage like the BAT although it was more detailed. Then I replaced the tubes with Telefunken 12ax7's and Amperex white label 6922's. To make this story short, my BAT is now up for sale. The point I'm trying to make is that sometimes these units are not so impressive in their stock configuration and can change dramatically with differenct tubes and power cords.
Good luck and Merry Christmas to you too!
Dan
Good luck and Merry Christmas to you too!
Dan