If that's not the Sentry but rather a generic super hero, was the Silver-Age Sentry deliberately designed to be as generic as possible?
I don't know if it was the intent, but there are so many classic Silver Age earmarks on his costume that it's easy to genericize* or look like it's a LOT of other folks.
*My spellchecker says this isn't a word. My spellchecker can bite me.