OK, I thought they were as well, knew the outputs were the same. Then hecked the schematics and saw minor diffs in PT sec resistance & voltages. They look like SAMS schematics too, what gives?
I do not always trust the sams manuals. Try to find the original Eico manuals. But as Dave said, you will be fine as they are the same transformers (as long as they are the actual originals)
I switched to Firefox last month and uninstalled Chrome. It would not display many links and I gave up trying to figure it out. On latest Windows 10 update.