And say me about arrays marked 3904 2222
is it simply plastic package for four different 2n3904 or 2n2222 transistors or it is also one monolitic chip?
Best to check the datasheet for the devices you are interested in. That should tell you how well matched the parts are.
Usually, they are a monolithic chip, but there sometimes are devices constructed out of multiple parts (hybrids, but they could still be matched parts, especially with very old electronics stuff, when matching parts e.g. transistors, was not uncommon). So checking the datasheet is best.