That is a really good question! There’s so little info about The Fellows. Let’s Make It Last sounds like Clinton and/or The Parliaments, but She’s Always There sounds (just like you said) nothing like The Parliaments…
I noticed that the liner notes on Testify! - The Best Of The Early Years says the following: I know nothing of The Fellows, a Temptationish sort of group produced by George. So I suppose it doesn’t has to mean anything that it’s in that compilation 
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I have another compilation with The Parliaments, I Wanna Testify, and that one only includes Let’s Make It Last (and not She’s Always There). Unfortunately, the liner notes on that compilation also doesn’t give any other information about The Fellows.
I asked Sidney Barnes if he knew anything about The Fellows, but he hasn’t gotten back to me yet.
I’m leaning towards that The Fellows is a separate group, but that George is singing lead on Let’s Make It Last. And that She’s Always There don’t have any Parliaments on it. But hey, I’m just guessing now. 
Would be great if there’s some more insight on The Fellows in the liner notes of the upcoming A New Day Begins.