Yes, there is a discernable difference for the better in the SE vs. the MK2 mainly due to the improvements in the reconstruction filter. There are other improvements in the MK2 version detailed on their webpage.
The V-Cap option is also worth it imo but the bybee may or may not be worth it depending on your power source (do you have a dedicated line without a lot of noise on it and do you use a nonrestictive condtioner like the Shunyata with it?).
From my experience the MK2 is a very musical, detailed but not harsh at all amp and one of the best I've listened to.
You have to run it in for 300-400 hours before doing any crtical assessments however.
The V-Cap option is also worth it imo but the bybee may or may not be worth it depending on your power source (do you have a dedicated line without a lot of noise on it and do you use a nonrestictive condtioner like the Shunyata with it?).
From my experience the MK2 is a very musical, detailed but not harsh at all amp and one of the best I've listened to.
You have to run it in for 300-400 hours before doing any crtical assessments however.