VTA-Board upgrade ST-70?

I do have a VTA board currently and it's an older version but right before the newer ones ... It's a LO GAIN where there were resistors values and such changed to use the 12AU7 tube and does not have the LM334's. Would there be any advantages to upgrade this board or leave things as they are?

likely not much of a difference sonically, although the newer version does have a CCS which gives perfect balance to the output phase splitters