Trying to replace tubes, since just got new ones and, but ofcourse one of the 4 i bought was dead from the box but i could use one of the old ones because it seems to have about the same bias point as the new ones

i compare with a multimeter and get 31 mV on the the old one, and one of the new is 29 mV one is 27,5 mV and the last one is 29,7 mV

is this differences ok?
Inspired by Ibanez RGA321F Prestige, Gibson Les Paul Standard
Powered by CAA OD100 standard+ , Mesa 2x12
Affected by Maxon OD808, Mad Professor Deep blue delay