Prior to the 90s, really old vintage blacks had their logos large and either centered, or offset. By the mid 90s or so, there was a transition from slider material and to small logo. However, you will find boards in the 80s and 90s which have a mixture of large and small. The newer the board, the more instances of having all switches with small logo.
My 80s bag has a mixture of large, small, and offset
My 90s bag has all small logo
Compared with current MX Blacks, they are all smoother, with the 80s bag significantly smoother than the 90s bag. Coincidentally I also have a NIB board with large logo black, and I would equate them to somewhere close to the 90s bag. In some cases, I can't tell them apart from the new MX blacks.